CD Manufacturing Dates

From Insulator Wiki (Wikilator)

(Difference between revisions)

Current revision

This is an approximate and incomplete list of dates that CDs were manufactured. If you can fill in some of the missing information, or correct mistakes, please do so!

The Trade Name, Application, and Hobby Nickname are mostly from N.R. Woodward's "The Glass Insulator in America" Reports.
The Start Date and End Date have four notations
- ">" which indicates the date is as specified or after
- "<" which indicates the date is as specified or before
- "~" which indicates the date is approximately
- dates in italics are our best guess, as opposed to fact based.
The References state where this information came from
Comments provides some additional information to help in the dating.
The Assigned Date and Comments show the date of publication of the first reference showing the CD (again, note that this is approximate).

NOTE: Rows in gray deal with CDs that have been deleted, combined with other CDs, or for which there are no known examples.

CD	Trade Name	Application	Hobby Nickname	Start Date	End Date	References	Comments	Assigned Date	Assigned Comments
100		Electric Fence		1945~	1955~	^[1] ^[2]	Unique to SURGE (1940-1978)	1967	[NRW67]
100.2		Electric Fence		1945~	1955~	^[1]	Unique to SURGE (1940-1978)	1976	[Mil76]
100.5	"J" Carrier	Midspan Transposition		1924>	1941<		Unique to PYREX (1924-1941)	1973	[GIaCR]
100.6				1870>	1967<		Unique to HEMINGRAY (1865-1970)	1979	[MilSPG79]
101	Pony	Telephone		1903>	1921<		Unique to BROOKFIELD (1869-1921). Embossing BROOKFIELD only.	1973	[GIaCR]
102	Pony	Telephone	Pony	1878	1912>	^[3]	Made by CALIFORNIA (1912-1916)	1967	[NRW67]
102.3		Telephone		1890	1897		NO NAME or K.C.G.W. (1890-1897). NO NAME of KCGW origin per McDougalds.	1973	[GIaCR]
102.4		Telephone		1883>	1888<	^[4]	Unique to NEW ENG.TEL.& TEL.CO.	1976	[Mil76]
102.7								1979	[MilSPG79]. No other reference. Re-assigned to CD 140.5
103	Pony	Telephone					NO NAME B or GAYNER (1920-1923)	1967	[NRW67]
103.4		Telephone					Unique to NO EMBOSSING	1976	[Mil76]
104	National Pony	Telephone		1912<	1912>			1967	[NRW67]
105		Telephone		1883	1886		NO EMBOSSING or AM.INSULATOR CO. (1883-1886). NO EMBOSSING an American product per McDougalds.	1973	[GIaCR]
106	Pony	Telephone	Pony	1892~	1955	^[5]^[6]		1967	[NRW67]
106.1	Pony	Telephone		1885	1895		Unique to DUQUESNE	1988	[NRW88]
106.2		Telephone					Unique to P.S.S.A.	1976	[Mil76]
106.3		Telephone		1885	1895		DUQUESNE or NO EMBOSSING. NO EMBOSSING a Duquesne product.	1976	[Mil76]
106.4		Telephone					Unique to NO EMBOSSING - MEXICO	1969	Originally CD 406. [NRW69]
106.5		Telephone		1940	1959		Unique to CRISOL TEXCOCO	1988	[NRW88]
107	Pony	Telephone		1924>	1969<		Start date based on ¸ marking end date based on Armstrong marking. All others fall within range.	1967	[NRW67]
107.2		Telephone					Unique to NO EMBOSSING	1976	[Mil76]. Not listed in 1979 Price Guide
108	Pony	Telephone						1969	[NRW69]
109	Fiske & Mott Pony	Telephone	Teardrop Pony or Chicago Teardrop Pony	1893	1894		Unique to CHICAGO INSULATING CO. (1893-1894)	1973	[GIaCR] (listed as CD 105 probably a typo)
109.5	Harloe's Patent	Telephone	Claw	1902	1906		Unique to HARLOE » (1902-1906)	1969	Originally CD 409. [NRW69]
109.7			Johnson & Watson	1908			Unique to JOHNSON & WATSON Pat'd 1908	1976	[Mil76]. Not listed in Woodward's 1988 Report
109.9			Ram's Head				Unique to PAT APP FOR	1976?	[Mil76]. Listed in 1979 and 1995 Price Guides
110	Pony External Thread	Telephone	Spiral Groove or Screw Top	1907	1921<		Unique to BROOKFIELD (1869-1921) Pat'd 1907	1967	[NRW67]
110.5		Telephone	Corkscrew or Screw Top	1884	1886		Unique to NATIONAL INSULATOR CO. (1884-1886)	1973	[GIaCR]
110.6		Telephone	Corkscrew or Screw Top	1884	1886		Unique to NATIONAL INSULATOR CO. (1884-1886)	1976	[Mil76]
111	Carrier	Telephone		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1976	[Mil76]
112	Pony Double Groove	Telephone	Keg or Exchange	1886>	1912>			1967	[NRW67]
112.4		Telephone	Exchange	1890>	1933<		Based on ????	1973	[GIaCR]
112.5		Telephone	Exchange			^[8]	NO EMBOSSING or NO NAME Canadians	1976	[Mil76]. Not listed in Woodward's 1988 Report
113	Pony Double Groove	Telephone	Keg or Exchange	1886>				1967	[NRW67]
113.2		Telephone	Exchange	1885	1895		DUQUESNE or NO NAME	1976	[Mil76]
113.4			Exchange					1979	[MilSPG79]. No other reference. Probably foreign -- CTRG in Milholland's 1976
114	Pony Double Groover	Telephone	Keg or Exchange	1886>	1920~		Unique to HEMINGRAY (1865-1970).	1967	[NRW67]
114.2		Telephone	Exchange	1893	1894		Unique to STANDARD GLASS INSULATOR CO. (1893-1894)	1976	[Mil76]
115	Exchange	Telephone	Exchange	1886>	1912>			1967	[NRW67]
115.1		Telephone		1886>			Unique to NO EMBOSSING.	1988	[NRW88]
116	Large Double Groove	Telephone	Three Rumple	1886>	1912>			1967	[NRW67]
116.5	Double Groove			1903>	1921<		Unique to B	1973	[GIaCR]
117	Twisted Pair	Telephone		1886>	1912>		Unique to NO NAME.	1967	[NRW67]
118		Telephone		1928>	1969<		Unique to NO EMBOSSING. Hemingray dump item start date based on use of carnival.	1973	[GIaCR]
119	O'Brien Patent	Telephone	O'Brien	1885	1903<		Unique to BROOKFIELD (1869-1921) (Pat'd 1885). End based on use of "W" in embossing.	1967	[NRW67]
120	Pony	Telephone						1969	[NRW69]
120.2	Pony	Telephone					PAT APP FOR or PONY	1973	[GIaCR]. Combined with CD 120 in 2003 McDougald's Price Guide.
121	Toll	Telephone	Toll	1880s	1935>	^[9]	Made by STANDARD GLASS INSULATOR CO (1893-1894) and MAYDWELL (1935-1940)	1967	[NRW67]
121.4	American Union	Telegraph		1871>	1893<		Unique to A.U. all have Pat'd 1871. End date based on absence of May 2 1893 patent date.	1973	[GIaCR]
122	Toll	Telephone	Toll	1919~	1969>	^[10]	Made by MCLAUGHLIN (1925-1935) and KERR (1969-1975)	1967	[NRW67]
122.4	CW Carrier	Telephone	1941<	1924>			PYREX (1924-1941) or HEMINGRAY (1865-1970)	1973	[GIaCR]
123		Telegraph		1870	1880		Unique to E.C.& M.CO. (1870-1880)	1969	[NRW69]
123.2		Telegraph		1870	1879<		Unique to CHESTER (1855-1879) (Pat'd 1870 date)	1988	[NRW88]
124	National Pony	Telephone						1967	[NRW67]
124.1				1871~	1873~	^[11]	Unique to PATENT - DEC. 19 1871
124.2		Telephone		1873~		^[11]	Unique to PATENT - DEC. 19 1871	1973	[GIaCR]
124.3		Telephone		1878~		^[11]	Unique to PATENT - DEC. 19 1871	1973	[GIaCR]
124.5		Lightning Rod	Wing Chambers	1877>			Unique to CHAMBERS Pat'd 1877	1973	[GIaCR]
125	Western Union	Telegraph						1967	[NRW67]
126	Western Union	Telegraph	Blob Top	1912<	1912>			1967	[NRW67]
126.1		Telegraph		1870>	1882<		Unique to BROOKFIELD (1869-1921) (Pat'd 1870 date). End date based on all embossings with 55 FULTON ST.	1979	[MilSPG79]
126.3	American Union	Telegraph					BROOKFIELD (1869-1921) A.U. or NO NAME	1969	Originally CD 427? [NRW69]
126.4	Western Union	Telegraph					AM.INSULATOR CO. (1883-1886) or W.E.MFG.CO.	1969	Originally CD 426. [NRW69]
127	Western Union	Telegraph						1969	[NRW69]
127.4		Telegraph					PATENT - DEC. 19 1871 or NO EMBOSSING	1976	[Mil76]
127.6								1979	[MilSPG79] listed as a Boston. Also in Millhollands. Dropped in favor of CD 143.6.
128	CS Carrier	Telephone		1941<	1969>		Made by PYREX (1924-1941) and KERR (1969-1975)	1967	[NRW67]
128.4	Carrier	Telephone	Big Mouth	1933	1967<		Unique to HEMINGRAY (1865-1970). Start date based on use of mold number	1969	Originally CD 428. [NRW69]
129	TS Carrier	Telephone		1954	1975<	^[12]^[13]	1967	[NRW67]
130		Telegraph		1877>	1908<		Unique to CAL.ELEC.WORKS (1877-1908)	1969	[NRW69]
130.1		Telegraph		1877>	1908<		Unique to CAL.ELEC.WORKS (1877-1908)	1973	[GIaCR]. Not listed in Woodward's 1988 Report
130.2			Seilers	1877			Unique to SEILERS Pat'd 1877 probably made by Hemingray	1979	[MilSPG79]
131		Telegraph		1865>	1890<		Dates based on Brookfield embossings. NO NAME insulators ignored.	1967	[NRW67]
131.4		Telegraph		1875<			Start date based on manufacture by Tillotson	1969	Originally CD 431. [NRW69]
131.8		Telegraph		1869	1879	^[14]	Unique to NO EMBOSSING	1976	[Mil76]. Not listed in 1979 Price Guide
132		Telegraph	Bullet					1969	[NRW69]
132.2		Telegraph		1869	1879	^[14]	PAISLEY or NO NAME	1976	[Mil76]
132.4		Lightning Rod	Chambers Companion	1877			Unique to PATENT - DEC. 19 1871 Pat'd 1877	1973	[GIaCR]
133	Regular	Telegraph Telephone	Bullet	1906<	1912>		Made by O.V.G. CO. (1903-1906)	1967	[NRW67]
133.1				1897		^[15]		1990	[McD]
133.2		Telegraph						1973	[GIaCR]
133.3		Telegraph						1976	[Mil76]
133.4		Telegraph	Bullet					1969	[Mil76]
133.5							Unique to TEL.FED.MEX	1990	[McD]
134	Deep Groove			1912<	1912>			1967	[NRW67]
134.4		Secondary					Unique to NO EMBOSSING	1976	[Mil76]
134.6	Philadelphia		Mad Hatter	1896	1921<		Unique to BROOKFIELD (1869-1921) Pat'd 1896	1972	Originally "temporary CD 430" [Mil72]
135	Fiske & Mott Regular		Chicago Diamond Groove	1893	1894		Unique to CHICAGO INSULATING CO. (1893-1894)	1969	[NRW69]
135.5		Telegraph		1861>			Unique to ERW	1973	[GIaCR]
136	B&O	Telegraph		1869>	1921<		BROOKFIELD (1869-1921) or B & O	1969	[NRW69]
136.4		Telegraph	Canadian Boston	1879<	1872>	^[16]	NO EMBOSSING or NO NAME	1976	[Mil76]
136.5				1871	1877		Unique to BOSTON BOTTLE WORKS (1871-1877)	1990	[McD]
136.7		Telegraph					PATENT - OTHER (1880-1881) or NO EMBOSSING	1976	[Mil76]
137		Secondary		1870>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
137.4								1979	[MilSPG79]. Not in McDougald's. Deleted as a fake.
137.5							Unique to NO EMBOSSING	1976	[Mil76]
138	Postal Telegraph			1869>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
138.2		Telegraph						1976	[Mil76]
138.9			Twin Pin					1976	[Mil76]
139	Combination Safety		Combination Safety	1903	1912>		Unique to COMBINATION SAFETY Pat'd 1903	1967	[NRW67]
139.6		Secondary		1924>	1941<		Unique to PYREX (1924-1941)	1976	[Mil76]. Not listed in Woodward's 1988 Report
139.8							Unique to NO EMBOSSING	1976	[Mil76]. Not listed in Woodward's 1988 Report
139.9	USLD			1925	1930		Unique to M„LAUGHLIN (1925-1935)	1969	Originally CD 439. [NRW69]
140	Jumbo	Feeder Cable	Jumbo					1967	[NRW67]
140.5			Cobalt Blob				Unique to NO NAME	1976	Previously CD 102.7 [Mil76]. Not listed in 1979 Price Guide
141		Telephone	Hot Cross Bun or Crosstop				Unique to NO EMBOSSING	1969	[NRW69]
141.5							Unique to NO EMBOSSING	1995	[McDPG95]
141.6			Blackburn	1893			Unique to PATENT - OTHER Pat'd 1893	1990	[McD]
141.7			Twiggs	1905			Unique to TWIGGS Pat'd 1905	1988	[NRW88]
141.8			Buzby	1890			Unique to BUZBY Pat'd 1890	1976	Originally CD 109.9. [Mil76]. Not listed in 1979 Report
141.9			Emmingers	1872			Unique to EMMINGER Pat'd 1872	1976	[Mil76]
142	W.U. Iridized	Telegraph		1939			HEMINGRAY (1865-1970) or NO NAME Pat'd 1939	1967	[NRW67]
142.4		Telegraph		1939			NO NAME or NO EMBOSSING Pat'd 1939	1976	[Mil76]
143	Dwight Pattern	Telegraph		1875	1906>	^[17]^[18]		1969	[NRW69]
143.4		Telegraph		1883	1886	^[19].	AM.INSULATOR CO. (1883-1886) or BROOKFIELD (1869-1921).	1976	[Mil76]
143.5				1883	1892		Unique to T-H.E.CO. (1883-1892)	1973	[GIaCR]
143.6		Telegraph		1871	1877		Unique to BOSTON BOTTLE WORKS (1871-1877)	1976	[Mil76]. Not listed in Woodward's 1988 Report
144	Foree Bain Patent		Foree Bain	1890			Pat'd 1890 Patent assigned to Hemingray 1901	1969	[NRW69]
144.5			Beehive	1890>			Unique to PATENT - OTHER (1890 Date)	1973	[GIaCR]
145		Telegraph		1883~	1947>	^[20]		1967	[NRW67]
145.5
145.6		Telegraph					BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING	1973	[GIaCR]
146		Telegraph					Unnamed unit		No Known Examples
146.4							Unique to NO EMBOSSING	1988	[NRW88]
146.5							NO NAME or NO EMBOSSING	1976	[Mil76]. Not listed in 1979 Price Guide
147	Barclay Patent	Telegraph	Spiral Groove or Screw Top	1907	1912>		Pat'd 1907	1967	[NRW67]
148									[McDPG03]
149	Burbrook		Burbrook				BROOKFIELD (1869-1921) or NO EMBOSSING	1969	[NRW69]
150	Deep Groove DP External Thread		Spiral Groove or Barclay or Screw Top	1907	1912>		BROOKFIELD (1869-1921) or BARCLAY Pat'd 1907	1967	[NRW67]
151	ell Double Petticoat	Telegraph						1967	[NRW67]
152	New Western Union	Telegraph & Telephone	Hoopskirt	1910	1921>	^[21]		1967	[NRW67]
152.2
153		Telegraph & Telephone						1967	[NRW67]
154	Double Petticoat	Telegraph & Telephone		1921	1967<	^[21]		1967	[NRW67]
154.3
154.5		Telegraph					DERFLINGHER or NO NAME - MEXICO	1969	Originally CD 454. [NRW69]
154.7
155		Telegraph & Telephone		1938	1978	^[22]^[23]		1967	[NRW67]
155.6				1870>	1967<		Unique to HEMINGRAY (1865-1970)	1976	[Mil76]. Not listed in Woodward's 1988 Report
156		Telegraph						1969	[NRW69]
156.1		Telegraph						1976	[Mil76]
156.2		Telegraph					PATENT - OTHER or NO EMBOSSING	1976	[Mil76]. Not listed in 1979 Price Guide OR Woodward's 1988 Report
157		Telegraph	Teepee				BROOKFIELD (1869-1921) or HEMINGRAY (1865-1970)	1969	[NRW69]
157.5		Telegraph		1893	1894		Unique to STANDARD (1893-1894)	1976	[Mil76]
158		Telegraph						1976	[Mil76]
158.1		Telegraph		1871			CHESTER (1871-1877) or NO EMBOSSING Pat'd 1871	1988	[NRW88]
158.2		Telegraph					BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING	1973	[GIaCR]
158.9		Telegraph	Screw Top Boston	1871	1877		Unique to BOSTON BOTTLE WORKS (1871-1877)	1973	[GIaCR]
159		Telegraph	Gregory	1903			Unique to GREGORY Pat'd 1903	1976	[Mil76]
160	Double Petticoat Pony	Telephone	Baby Signal	1889	1957~			1967	[NRW67]
160.4
160.6		Telephone	Pilgram Hat	1885>	1915<		Unique to AM.TEL.& TEL.CO. (1885-1915)	1973	[GIaCR]. Listed in Milholland's Bicentennial and 1979 Price Guide as CD 160.5.
160.7			Ice Cream Cone or Snow Cone	1883	1886		Unique to AM.INSULATOR CO. (1883-1886)	1971	Originally CD 461. Insulators With Embossing Errors
161		Secondary		1916<	1912>		STAR ¥ or CALIFORNIA (1912-1916)	1969	[NRW69]
161.2		Secondary		1869>	1921<		Unique to BROOKFIELD (1869-1921)	1976	[Mil76]
162	Deep Groove Double Petticoat	Secondary	Signal	1890~	1942	^[24]	Started in the late 1880s	1967	[NRW67]
162.05								1979	[MilSPG79]. Not in McDougald's
162.1		Secondary					STAR ¥ or BROOKFIELD (1869-1921)	1976	[Mil76]
162.2								1979	[MilSPG79]. Not in McDougald's
162.3		Secondary					STAR ¥ or BROOKFIELD (1869-1921)	1976	[Mil76]
162.4		Secondary					NO NAME or NO EMBOSSING Canadians	1973	[GIaCR]
162.5	P.R.R.	Telegraph					P.L.W. or P.R.R.	1969	Originally CD 462. [NRW69]
162.6								1979	[MilSPG79]. Not in McDougald's
162.7		Telegraph					Various Mexican only	1976	[Mil76]
163		Secondary						1967	[NRW67]
163.2		Secondary					Unique to NO NAME	1988	[NRW88]
163.4							Unique to WHITALL TATUM ¸ (1922-1946)	1999	[McDPG99]
164	Extra Deep Groove DP	Secondary		1912<	1912>			1967	[NRW67]
164.4		Secondary		1920	1930		Unique to NO EMBOSSING (FRY 1920-1930)	1973	[GIaCR]
165		Secondary		1870>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
165.1		Secondary		1922>	1946<		Unique to WHITALL TATUM ¸ (1922-1946)	1973	[GIaCR]
166		Secondary		1912	1916		Unique to CALIFORNIA (1912-1916)	1969	[NRW69]
166.2		Secondary					E.L.CO. (1890-1910) or NO EMBOSSING	1973	[GIaCR]
167		Secondary		1946		^[25]	ARMSTRONG Á (1946-1969) or NO NAME	1967	[NRW67]
168		Secondary					WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)	1967	[NRW67]
168.5							Unique to NO NAME	1976	[Mil76]
168.6
169		Secondary					WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)	1969	[NRW69]
169.5		Telegraph		1869>	1921<		Unique to BROOKFIELD (1869-1921)	1976	[Mil76]
170		Secondary					Unique to NO EMBOSSING	1969	[NRW69]
170.1		Secondary					Unique to NO EMBOSSING	1973	[GIaCR]
170.4								1979	[MilSPG79]. Not in McDougald's
171	Telegraph or Heavy Telegraph	Telegraph							No Known Examples
172	Small Deep Groove Double Petticoat	Secondary							No Known Examples
173		Secondary		1912<	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
174	Wide Groove DP	Secondary		1912<	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
174.5				1924>	1941<		Unique to PYREX (1924-1941)
175		Secondary	Door Knob	1870>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
175.5
176	Carrier	Telephone	Mushroom	1929			Unique to WHITALL TATUM ¸ (1922-1946) Pat'd 1929	1976	[Mil76]
176.9			Toadstool				Unique to HEMINGRAY	2000
177							Previously foreign (VEGLA)		No Known Examples
178	Santa Ana	7 500v	Santa Ana	1912<	1912>			1967	[NRW67]
178.5				1915>			Unique to LOCKE (1892-). Only embossing includes 1915 Patent date.	1995	[McDPG95]
179							Previously foreign (ESA ILNS SEDIVER)		No Known Examples
180	Liquid Insulator		Liquid Insulator	1894<			Unique to LIQUID INSULATOR old style as of 1894 Pat	1976	[Mil76]
180.1			Fluid Insulator	1894<			Unique to FLUID INSULATOR old style as of 1894 Pat	1990	[McD]. Now CD 180.5
180.5			Fluid Insulator	1894<				1999	[McDPG99]
181			Pluto				Unique to NO EMBOSSING	1973	[GIaCR]
181.5			Spaceman				Unique to NO EMBOSSING	1995	[McDPG95]
182	Dry Spot	Telegraph	Dry Spot	1926	1926	^[26]	Unique to DRY SPOT INSULATOR Whitall Tatum (1922-1946) Pat'd 1929	1976	[Mil76]
183		Primary		1870>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
184			Climax	1869>	1921<		Unique to CLIMAX Brookfield (1869-1921) dump item	1990	[McD]
185	Mine Insulator		Mine Insulator	1912<	1912>			1967	[NRW67]
185.2							Unique to B.E.L.CO.	1976	[Mil76]
186		Spark Gap Insulator		1940	1940	^[27]	Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
186.1		Spark Gap Insulator		1940	1940	^[27]	Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
186.2		Spark Gap Insulator	Nut	1940	1940	^[27]	Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
187	Brown Pony	Telephone	Duplex	1912<	1912>			1967	[NRW67]
188	Brown Deep Groove		Duplex	1912<	1912>			1967	[NRW67]
189									No Known Examples
190/191	Hibbard Transposition	Telephone	Two Piece Tramp	1886>	1912>			1967	[NRW67]
192.1/193.1			Two Piece Tramp	1886>			AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING	1988	[McD] 192.1 / [Mil76] 193.1
192/193	Hibbard Transposition	Telephone	Two Piece Tramp	1886>			AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING	1976	[Mil76]
194.5/195.5			Two Piece Tramp	1930	1941<		Unique to PYREX (1924-1941) Pat'd 1930	1990	[McD]
194/195	Transposition	Telephone	Two Piece Tramp	1886>	1967<		Unique to HEMINGRAY (1865-1970)	1969	[NRW69]
196	Perfect Transposition	Telephone	Tramp	1886>	1912>			1967	[NRW67]
196.2			Tramp	1883>	1910<	^[28]	Unique to H.G.CO.	1990	[McD]
196.5			Tramp	1883>	1910<	^[29]	Unique to H.G.CO.	1990	[McD]
197	Transposition	Telephone	Tramp	1886>			WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)	1967	[NRW67]
198				1886>					No Known Examples
199	Transposition	Telephone	Tramp	1902	1903		Unique to PRISM ¬ (1902-1903)	1973	[GIaCR]
200	Transposition	Telephone	Tramp	1900~	1915~	^[30]	STAR ¥ CALIFORNIA (1912-1916) or NO NAME	1967	[NRW67]
201	Transposition	Telephone	Tramp	1886>	1912>		HEMINGRAY (1865-1970) CALIFORNIA (1912-1916) or H.G.CO.	1967	[NRW67]
202	Transposition	Telephone	Tramp	1896	1912>	^[31]		1967	[NRW67]
203	Transposition	Telephone	Tramp	1946		^[32]		1967	[NRW67]
203.2	Transposition	Telephone	Tramp	1956	1969<		Unique to ARMSTRONG Á (1946-1969) Pat'd 1956	1976	[Mil76]
204	Transposition	Telephone	Locke Crosstop or Tramp	1892	1895	^[31]	LOCKE (1892-) or NO EMBOSSING Pat'd 1894. NO EMBOSSINGs made first around 1892 only manufactured for a short while.	1973	[GIaCR]
205	Transposition	Telephone or Secondary	Tramp	1886>	1912>			1967	[NRW67]
205.5	Large Double Groove DP			1886>			Unique to NO EMBOSSING	1988	[NRW88]
206		Telephone	Castle	1935>	1940<	^[33]	Unique to NO EMBOSSING	1969	[NRW69]
206.5		Telephone	Claw	1902	1906		Unique to HARLOE » (1902-1906)	1979	[MilSPG79]
207				1900	1921<		Unique to B Pat'd 1900	1973	[GIaCR]
207.5
208	Top Groove Telephone	Telephone	Top Groove Hot Cross Bun	1890>	1912>		Made by CALIFORNIA (1912-1916)	1967	[NRW67]
209				1890>					GIFONA - Chilean piece.
210	Standard Postal Telegraph	Telegraph		1917			POSTAL or NO EMBOSSING Pat'd 1917	1967	[NRW67]
211	No Leak	Telegraph	No Leak	1908	1921<	^[34]	Unique to BROOKFIELD (1869-1921) Pat'd 1908	1973	[GIaCR]
212				1890>					No Known Examples
213	Top Groove Western Union	Telegraph		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
214		Telegraph		1921>		^[21]		1967	[NRW67]
215				1890>					No Known Examples
216		Primary		1890>				1967	[NRW67]
217		Primary		1946>	1969<		Unique to ARMSTRONG Á (1946-1969)	1967	[NRW67]
218		Primary		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
219		Primary		1890>			HEMINGRAY (1865-1970) or NO EMBOSSING	1967	[NRW67]
220		Primary		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
220.1							1979	[MilSPG79]. Not in McDougald's
221		Primary		1890>			WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)	1967	[NRW67]
222	Small Top Groove Double Petticoat	5 000v		1890>					No Known Examples
223	High Voltage Double Petticoat	7 500v		1890>					No Known Examples
224	High Voltage Double Petticoat	10 000v		1890>					No Known Examples
225		5 000v		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
226		5 000v		1890>	1912>		Unique to NO NAME	1967	[NRW67]
226.3		Primary		1903>	1921<		Unique to B	1988	[NRW88]
227	Large Groove Double Petticoat	5 000v		1890>	1912>				No Known Examples
228		10 000v		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
228.5		Primary		1946>	1969<		Unique to ARMSTRONG Á (1946-1969)	1988	[NRW88]
229	Top Groove Double Petticoat	3 000v		1890>	1912>				No Known Examples
229.6		Primary		1920	1930		Unique to NO EMBOSSING (FRY 1920-1930)	1988	[NRW88]
230		6 600v	Frog Eyes	1890>				1967	[NRW67]
230.1		6 600v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
230.2		6 600v		1946>	1969<		Unique to ARMSTRONG Á (1946-1969)	1976	[Mil76]
231		Primary		1951		^[35]	KIMBLE (1952-1970) or HEMINGRAY (1865-1970)	1976	[Mil76]
231.2		Primary		1952>	1970<		Unique to KIMBLE (1952-1970)	1973	[GIaCR]
232		11 000v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
232.1		11 000v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1973	[GIaCR]
232.2				1890>
233		6 600v		1926	1912>		^[7]	1967	[NRW67]
233.2				1890>	1967<		Unique to HEMINGRAY (1865-1970)	1990	[McD]
234		8 000v		1924>	1941<		Unique to PYREX (1924-1941)	1967	[NRW67]
234.5				1890>
235		8 000v		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
236		Primary		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1976	[Mil76]
237		13 500v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
238		Primary		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
238.1				1890>	1967<		Unique to HEMINGRAY (1865-1970)	1995	[McDPG95]
238.2				1946>	1969<		Unique to ARMSTRONG Á (1946-1969)	1990	[McD]
238.6				1890>
239		Primary		1951		^[36]	KIMBLE (1952-1970) or HEMINGRAY (1865-1970)	1967	[NRW67]
239.2		Primary		1952>	1970<		Unique to KIMBLE (1952-1970)	1976	[Mil76]. Not listed in Woodward's 1988 Report
240		13 500v		1927	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
240.2		Primary		1890>			NO NAME or NO EMBOSSING	1976	[Mil76]
240.5		Primary		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1976	[Mil76]
241		6 600v		1916~	1967<	^[31]	Unique to HEMINGRAY (1865-1970).	1967	[NRW67]
241.2		6 600v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
242		10 000v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
243		15 000v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
244			Pomona or Crosstop	1892~	1895~		Unique to NO EMBOSSING Line construction use from ~1892 to 1895	1976	[Mil76]
244.5				1890>			Unique to GREELEY	1990	[McD]
245		Primary		1890>	1892		Unique to T-H. (1883-1892)	1973	[GIaCR]
245.2				1890>
246	High Voltage Double Petticoat	10 000v		1890>					No Known Examples
247		Primary		1890>			Unique to NO EMBOSSING	1976	[Mil76]
247.3				1890>
248/311/311	Montana	15 000v	Montana or Stacker	1890>			HEMINGRAY (1865-1970) or PYREX (1924-1941)	1967	[NRW67]
249	Provo		Provo	1902	1967<	^[37]	Unique to HEMINGRAY (1865-1970)	1976	[Mil76]
250		Cable		1899	1899		Unique to N.E.G.M.CO. (1899)	1969	[NRW69]
250.2		Telephone		1890>			Unique to ERICSSON	1976	[Mil76]
251		Cable		1890>	1912>			1967	[NRW67]
252	Knowles Cable	Cable		1890>	1912>			1967	[NRW67]
253	Knowles Cable	Cable		1900	1903		Unique to KNOWLES (1900-1903)	1976	[Mil76]
254	Knowles Cable	Cable		1890>	1912>			1967	[NRW67]
255		Cable		1890>					No Known Examples
256	Manhattan Cable	Cable	Manhattan	1890>			Unique to MANHATTAN	1969	[NRW69]
257		Cable	Mickey Mouse	1890>			HEMINGRAY (1865-1970) or PATENT - OTHER	1967	[NRW67]
258		Cable	Roman Helmet	1890>			Unique to CABLE	1976	[Mil76]
259		Cable	Roman Helmet	1890>	1912>			1967	[NRW67]
260		Cable	Roman Helmet	1890>	1912>		Made by CALIFORNIA (1912-1916)	1969	[NRW69]
261				1890>					No Known Examples
262	Columbia Single Petticoat	Cable	Baby Columbia	1890>	1912>		Unique to COLUMBIA	1967	[NRW67]
263	Columbia	Cable	Columbia	1890>	1912>			1967	[NRW67]
264	Columbia	Cable	Columbia	1890>			Unique to COLUMBIA	1976	[Mil76]
265	Fisher	Third Rail	Fisher	1883>	1888~		FISHER or NO EMBOSSING Electric railway developed mid 1880s in use 'till 1888	1973	[GIaCR]
265.1
266	Boston Cable	Cable	Boston Cable	1890>			Unique to PATENT - OTHER (1890 Date)	1967	[NRW67]
267	Boston Cable	Cable		1890>	1912>			1967	[NRW67]
267.5		Cable	Straight Sides	1899	1899		Unique to N.E.G.M.CO. (1899)	1976	[Mil76]
268	Crown	Cable	Crown	1895	1912>		Unique to THE CROWN Pat'd 1895	1967	[NRW67]
268.5		Cable		1893	1894		Unique to STANDARD (1893-1894)	1976	[Mil76]
269	New Jumbo	Cable	Eared Jumbo	1890>	1912>		OAKMAN MFG.CO. (1890-1897) or JUMBO	1967	[NRW67]
270		Cable		1890>			Unique to NO EMBOSSING	1976	[Mil76]
271				1890>
272		6 600v		1890>	1912>			1967	[NRW67]
273		5 000v		1890>	1912>		Unique to NO EMBOSSING	1967	[NRW67]
274	High Voltage Double Petticoat	11 000v		1890>					No Known Examples
275		10 000v		1890>	1912>		LOCKE (1892-) or NO NAME	1967	[NRW67]
276				1890>					No Known Examples
277	Extra Large Top Groove Double Petticoat	6 600v		1890>					No Known Examples
278				1890>					No Known Examples
279				1890>					No Known Examples
280		Primary						1967	[NRW67]
281		10 000v					HEMINGRAY (1865-1970) or LYNCHBURG ¨ (1923-1925)	1967	[NRW67]
282	Provo	13 200v	Provo	1897		^[38]		1967	[NRW67]
283	Provo	15 000v	Provo	1897		^[39]		1967	[NRW67]
284	Floy	11 000v		1912<	1912>		Unique to FLOY	1967	[NRW67]
285	4-inch Edison		Edison	1892			Unique to NO EMBOSSING Pat'd 1892	1967	[NRW67]
286				1892>			Unique to LOCKE (1892-)	1976	[Mil76]
286.9				1886>	1898<		Unique to WESTINGHOUSE (1886-1898)	1990	[McD]
287		10 000v		1895	1912>	^[31]	LOCKE (1892-) or NO NAME. NO NAME manufactured by Brookfield.	1967	[NRW67]
287.1				1894	1895	^[31]	Unique to LOCKE (1892-). Manufactured by Brookfield.	1976	[Mil76]
287.2				1891	1894	^[31]	Unique to BROOKFIELD (1869-1921).	1973	[GIaCR]
288	Mershon	12 000v	Mershon	1912<	1912>			1967	[NRW67]
289		18 000v		1912<	1912>		LOCKE (1892-) or NO EMBOSSING	1967	[NRW67]
289.9				1889	1893	^[31]	Unique to PATENT - OTHER Pat'd 1889.	1990	[McD]
290				1890>					No Known Examples
291				1890>			HEMINGRAY (1865-1970) or NO NAME	1976	[Mil76]
292	Lachine Triple Petticoat	Primary		1890>				1967	[NRW67]
292.5				1900	1903		Unique to KNOWLES (1900-1903)	1976	[Mil76]
293		Primary		1897			Unique to LOCKE (1892-)	1976	[Mil76]
293.1		Primary		1892>			Unique to LOCKE (1892-)	1988	[NRW88]
294				1899	1899		Unique to N.E.G.M.CO. (1899)	1976	[Mil76]
295		10 000v		1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
296		10 000v		1890>	1912>			1967	[NRW67]
297		15 000v		1890>	1912>			1967	[NRW67]
298			Ballerina	1890>			Unique to NO EMBOSSING	1976	[Mil76]
299		11 000v		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
299.1		10 000v		1902	1903		Unique to PRISM ¬ (1902-1903)	1976	[Mil76]
299.2		Primary		1920	1930		Unique to NO EMBOSSING (FRY 1920-1930)	1976	Originally CD 315.5? [Mil76]. Not listed in 1979 Price Guide
299.7				1890>
300		20 000v		1890>	1912>		LOCKE (1892-) or BROOKFIELD (1869-1921)	1967	[NRW67]
301				1890>			Unique to NO EMBOSSING	1976	[Mil76]
301.2		Primary		1920	1930		Unique to NO EMBOSSING (FRY 1920-1930)	1988	[NRW88]
301.5				1890>	1967<		Unique to HEMINGRAY (1865-1970)	1976	[Mil76]. Not listed in Woodward's 1988 Report
302	7-inch Muncie	15 000v	Muncie	1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
303.5			Provo	1890>	1967<		Unique to HEMINGRAY (1865-1970)	1990	[McD]
303/310	9-inch Muncie	20 000	Muncie	1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
304/310			Coolie Hat	1890>			HEMINGRAY (1865-1970) or NO EMBOSSING	1976	[Mil76]. Not listed in 1979 Price Guide
305	Small Top Groove Triple Petticoat	7 500v		1890>					No Known Examples
306				1923	1925		Unique to LYNCHBURG ¨ (1923-1925)	1973	[GIaCR]
307		10 000v	Viking Helmet	1890>	1967<		Unique to HEMINGRAY (1865-1970)	1967	[NRW67]
308	Cable	6 600v	Viking Helmet	1890>	1912>		NO EMBOSSING or NO NAME	1967	[NRW67]
309			Beal's	1899			Unique to BEAL'S Pat'd 1899	1990	[McD]
309.5				1886>	1898<		Unique to WESTINGHOUSE (1886-1898)	1990	[McD]
310
311
312							Unique to NO EMBOSSING	1990	[McD]. Previously sleeve to CD 249 has been dropped in 2003 PG.
313							Unique to NO EMBOSSING	1990	[McD]
313.1							Unique to NO EMBOSSING	1990	[McD]
314							Unique to NO EMBOSSING	1990	[McD]. Previously sleeve to CD 317.7 has been dropped in 2003 PG.
315	Type HG			1902	1903		Unique to PRISM ¬ (1902-1903)	1967	[NRW67]
315.5								1979	[MilSPG79]. Not in McDougald's
316		7 500v		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
316.5								1979	[MilSPG79]. Not in McDougald's
317		Lightning Rod	Candlestick or Bell Chambers	1877>			Unique to CHAMBERS Pat'd 1877	1973	[GIaCR]
317.5		Lightning Rod		1877>			Unique to CHAMBERS Pat'd 1877	1973	[GIaCR]
317.7				1883>	1910<	^[40]	Unique to H.G.CO.	1990	[McD]
317.8/313/313/313.1				1902			Unique to PATENT - OTHER Pat'd 1902	1990	[McD]
317.9							Unique to NO EMBOSSING	1976	[Mil76]
318	Niagara High Potential	20 000v		1892>	1912>		Unique to LOCKE (1892-)	1967	[NRW67]
319	Special High Potential	21 000v		1892>	1912>		Unique to LOCKE (1892-)	1967	[NRW67]
320		17 000v		1924>	1941<		Unique to PYREX (1924-1941)	1967	[NRW67]
321			Bat Ears	1902	1903		PRISM ¬ (1902-1903) or PATENT - OTHER	1969	[NRW69]
322		23 000v		1927	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
323		30 000v		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
324		35 000v		1932	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
325		40 000v		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
326		45 000v		1932	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
327		50 000v		1926	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
328		55 000v		1932	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
328.2				1924>	1941<		Unique to PYREX (1924-1941)	1995	[McDPG95]
329									No Known Examples
330		66 000v		1932	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
331		70 000v		1930	1941<	^[7]	Unique to PYREX (1924-1941).	1967	[NRW67]
332									No Known Examples
333				1902	1903		Unique to PRISM ¬ (1902-1903)	1973	[GIaCR]
338		16 000v		1890>	1921<		Unique to BROOKFIELD (1869-1921)	1967	[NRW67]
342		25 000v		1903	1903	^[41]	Unique to LOCKE (1892-)	1967	[NRW67]

[edit]

References

[GIaCR] Cranfill, Gary & Kareofelas, Greg (1973). The Glass Insulator A Comprehensive Reference.
[MilSPG79] Keating, Paul (1979). Milholland's Suggested Insulator Price Guide.
[McD] McDougald, John & Carol (1990). Insulators A History and Guide to North American Glass Pintype Insulators.
[McDPG95] McDougald, John & Carol (1995). Price Guide to North American Pintype Insulators.
[McDPG99] McDougald, John & Carol (1999). Price Guide to North American Pintype Insulators.
[McDPG03] McDougald, John & Carol (2003). Price Guide to North American Pintype Insulators.
[Mil72] Milholland, Marion (1972). Most About Glass Insulators Revised.
[Mil76] Milholland, Marion (1976). Most About Glass Insulators Bicentennial Edition.
[NRW67] Woodward, N.R. (1967). The Glass Insulator in America 1967 Report.
[NRW69] Woodward, N.R. (1969). The Glass Insulator in America 1969 Report.
[NRW88] Woodward, N.R. (1988). The Glass Insulator in America 1988 Report.

[edit]

General Dating Rules

1886> typically indicates a start date based on the origin of transposition theory
1890> typically indicates a start date based on the saddle groove patent
1912> or 1912< typically indicates the CD appeared in the Brookfield 1912 Catalog

[edit]

Notes

↑ ^1.0 ^1.1 CD 100 and CD 100.2 Crown Jewels, December 1985. http://cjow.com/archive/article.php?month=12&a=12Surge%20Fencer%20Post%20and%20Insulator.htm&year=1985
↑ Per N.R. Woodward, as shared by Bill Meier on ICON, 12/20/2020: The first CD #100 insulators were embossed with the words "T.M.REQ.PAT.PEND", below the SURGE name, which is in large letters. This is not an error embossing as explained below. Later insulators replace this with the words "REG.U.S.PAT.OFF." During a visit to the facility on April 22, 1970, I was permitted to review a file which contained several documents relating to the fence insulators. One was a letter from their attorney advising that the marking T.M.REQ. (Trade Mark Requested) was not conventional, and should be changed to the normal REG.U.S.PAT.OFF., which obviously was done. Another was a letter from a patent attorney stating that in his opinion the insulator would not be patentable since it did not differ materially from the usual telephone insulators. It would seem that he was also correct, as Design Patent number 113,240 was rejected. Unfortunately I had no means of obtaining copies; and those files in all probability no longer exist.
↑ CD 102 Per N.R. Woodward on Hemingray
↑ CD 102.4 a product of the Lyndeborough Glass Company, South Lyndeboro, New Hampshire (1866-1888). Many shards have been found by a digger at the old glassworks site. Per David Whitten, 10/12/2009 email.
↑ "The CD 106 Hemingray-9 was introduced in either 1892 or 1893 and continued in production until at least the early 1950's (my example is 1951) until replaced by the CD 107 Hemingray-9 in 1956." Per Bob Stahr, 09/12/2007 email on ICON.
↑ CD 106 Per N.R. Woodward on Hemingray
↑ ^7.00 ^7.01 ^7.02 ^7.03 ^7.04 ^7.05 ^7.06 ^7.07 ^7.08 ^7.09 ^7.10 ^7.11 ^7.12 ^7.13 McDougald, John & Carol (1990). Insulators A History and Guide to North American Pintype Insulators
↑ CD 112.5 McDougald's 2003 combined w/CD 112.4
↑ "CD #121 was the original AT&T long distance style used starting with the first long lines in the 1880s. Until WWI it was esssentially unchanged." N.R. Woodward on ICON, 12/14/2009.
↑ "CD #122 came along in 1919-20, the change in design was the larger square wire groove; and corresponding greater outward slant to the skirt and slightly greater base width" N.R. Woodward on ICON, 12/14/2009.
↑ ^11.0 ^11.1 ^11.2 " Hemingray offered their smallest "bullet", the CD 124.1 probably as early as the 1871 Patent they wear. It is believed the 124.2 superseded the .1 as early as 1873, with the 124.3 being offered by about the time the very first Brookfield produced "pony" was introduced in the July, 1878 Tillotson catalogue." Brent Burger in ICON 2009.10.15 digest.
↑ CD #129 should have a date of 1954. First ones were made that year by both Owens and Armstrong. The single-page brochure I have advertising the "TS" as a "new insulator" has a print date of 1955. Per N.R. Woodward on ICON, 10/16/2009
↑ End date based on Kerr production.
↑ ^14.0 ^14.1 See Jan, 2007 CJ (http://www.cjow.com/archive/article.php?month=1&a=01paisley_insulators.htm&year=2007). Unique to Paisley insulators.
↑ CD 133.1 Included in 1897 Electrical Appliance Catalog
↑ The versions with segmented threads are through to have been made by Boston Bottle Works, or Bay State Glass Works, active from 1872-1879. See http://cjow.com/archive/article.php?month=8&a=08Patent%20Pages.htm&year=1979 , http://cjow.com/archive/article.php?month=9&a=09Samuel%20Oakman%20and%20Boston%20Insulator%20Production.htm&year=1988 , and http://cjow.com/archive/article.php?month=6&a=06Boston%20Family%20Album.htm&year=2004
↑ Unsure when Canadian glass houses started using threads, but likely in the 1870s. All Dwight Patterns are thought to be Brookfield products, but were never made in Old Bridge colors. This implies these stopped being made by 1906. Other CD 143s could have been made later.
↑ per Barret Nicpon, 8/15/2016 on ICON: As far as the Dwight CD-143 use era, I would suggest that a general turn-of-century window is probably appropriate for these pieces. This isn't based on any written or historical data, but rather on my own digging experience. They seem to have begun to be used sometime in perhaps the mid-to-late 1890s, and their use was probably truncated by the beginnings of G.N.W. TEL. CO. CD-145 production. These seem to have been in prolific use by the early 1900s. I can't personally offer much assurance on the accuracy of these dates, unfortunately. As far as the use of threadless in Canada goes, I believe the magic date for the switchover to threaded glass took place around 1875-1877, depending on the company and individual line. Again, this is based on my own personal experience of line construction dates compared with digging finds. This is also based on correspondence with other collectors who have indicated threadless glass can be found on even newer lines on rare occasions. This, I assume, is an example of a frugal line superintendent or telegraph company continuing to re-use new-old-stock insulators into more modern eras. Overwhelmingly, it seems threadless were no longer being used by the beginning of 1877 and had been replaced by early 143s, such as threaded 743.x, Montreal Telegraph CD-143s, and other unembossed 143s.
↑ CD 143.4 McDougald's states that manufactured at similar time to CD 145
↑ CD 145 Probably first made by AMERICAN. Hemi clear units made at least until 1947.
↑ ^21.0 ^21.1 ^21.2 1946 Hemingray Catalog
↑ CD 155 Per N.R. Woodward on Hemingray
↑ CD 155 KERR known with 1978 date code
↑ CD 162 Per N.R. Woodward on Hemingray
↑ CD 167 Per N.R. Woodward on Whitall Tatum
↑ The Rainbow Riders' Trading Post, June 15, 1995. Vol. 4, No. 6, p9. "The Millville Report" by Richard Wentzel. "...figures A, B, and C verify production of 1,241 pieces during trial automated production from April 12 through April 17, plus 882 pieces produced on June 7, for a total of 2,133, plus an unspecified amount produced on April 6."
↑ ^27.0 ^27.1 ^27.2 CD 186, 186.1, and 186.2 are experimental Hemingray pieces made in 1940. The date code all three CDs insulators is "38:". CD 186 is shown in Utility Patent 2,392,342 issued to Alwin G. Steinmayer on January 8, 1946 See http://www.insulators.info/pictures/?id=120222643
↑ CD 196.2 1893-1910 per Bob Stahr note
↑ CD 196.5 1893-1910 per Bob Stahr note
↑ CD 200 Insulator of the Week 27 Dec 2007. http://www.insulators.info/wiki/IOTW_CD_200
↑ ^31.0 ^31.1 ^31.2 ^31.3 ^31.4 ^31.5 ^31.6 Gish, Elton (1994). Fred M. Locke A Biography
↑ CD 203 Per N.R. Woodward on Whitall Tatum
↑ CD 206 thought to have been made by both McLaughlin and Maydwell
↑ CD 211 1909 - 12 or so per trade articles from Elton/Bob Stahr
↑ CD 231 1951 start per N.R. Woodward
↑ CD 239 1951 start per N.R. Woodward
↑ CD 249 Bob Stahr (7/7/9 note) agreement dated Aug 2 1902 with shipment due 60 days after
↑ CD 282 Included in 1897 Electrical Appliance Catalog
↑ CD 283 Included in 1897 Electrical Appliance Catalog
↑ CD 317.7 1893-1910 per Bob Stahr note
↑ CD 342s were made in a single production run in late 1903. The very first CD 342 tops had no embossing and were likely prototypes made before the embossing was engraved. Note that unembossed bases were produced May - December, 1900 for the M-2795 gutter tops. CD 342s with unembossed bases are reconstructed from a CD 342 top and a M-2795 bottom. Per correspondence with Mike Spadafora, 10/29/2010.

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Category: CD Numbers

CD Manufacturing Dates

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-{|class="wikitable" style="text-align:center;" border="1"
+This is an approximate and incomplete list of dates that CDs were manufactured.  If you can fill in some of the missing information, or correct mistakes, please do so!
+* The Trade Name, Application, and Hobby Nickname are mostly from N.R. Woodward's "The Glass Insulator in America" Reports.
+* The Start Date and End Date have four notations
+** ">" which indicates the date is as specified or after
+** "<" which indicates the date is as specified or before
+** "~" which indicates the date is approximately
+** dates in italics are our best guess, as opposed to fact based.
+* The References state where this information came from
+* Comments provides some additional information to help in the dating.
+* The Assigned Date and Comments show the date of publication of the first reference showing the CD (again, note that this is approximate).
+NOTE:  Rows in gray deal with CDs that have been deleted, combined with other CDs, or for which there are no known examples.
+{|style="text-align:center; border-collapse: collapse;" border="1" cellpadding="2"
+!CD
+!Trade Name
+!Application
+!Hobby Nickname
+!Start Date
+!End Date
+!References
+!Comments
+!Assigned Date
+!Assigned Comments
 |-
-! style="vertical-align: top; width: 50px" | CD
+| align="left" |100|| &nbsp;|| Electric Fence|| &nbsp;|| 1945~|| 1955~|| <ref name="surge">CD 100 and CD 100.2 Crown Jewels, December 1985.  http://cjow.com/archive/article.php?month=12&a=12Surge%20Fencer%20Post%20and%20Insulator.htm&year=1985</ref> <ref name="surge2">Per N.R. Woodward, as shared by Bill Meier on ICON, 12/20/2020: The first CD #100 insulators were embossed with the words "T.M.REQ.PAT.PEND", below the SURGE name, which is in large letters. This is not an error embossing as explained below.  Later insulators replace this with the words "REG.U.S.PAT.OFF."
-! Name
-! Application
+During a visit to the facility on April 22, 1970, I was permitted to review a file  which contained several documents relating to the fence insulators.  One was a letter from their attorney advising that the marking T.M.REQ. (Trade Mark Requested) was not conventional, and  should be changed to the normal REG.U.S.PAT.OFF., which obviously was done.  Another was a letter from a patent attorney  stating that in his opinion the insulator would not be patentable since it did not differ materially from the usual telephone insulators.  It would seem that he was also correct, as Design Patent number 113,240 was rejected. Unfortunately I had no means of obtaining copies; and those files in all probability no longer exist.</ref>|| Unique to SURGE (1940-1978)|| 1967|| [NRW67]
-! Nickname
-! Start Date
-! End Date
-! References
-! Comments
-! Assigned Date
-! Assigned Comments
 |-
+| align="left" |100.2|| &nbsp;|| Electric Fence|| &nbsp;|| 1945~|| 1955~|| <ref name="surge" />|| Unique to SURGE (1940-1978)|| 1976|| [Mil76]
 |-
-!CD 100|| &nbsp;|| Electric Fence|| &nbsp;|| 1945~|| 1955~|| &nbsp;|| Unique to SURGE (1940-1978)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |100.5|| "J" Carrier|| Midspan Transposition|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1973|| [GIaCR]
 |-
-!CD 100.2|| &nbsp;|| Electric Fence|| &nbsp;|| 1945~|| 1955~|| &nbsp;|| Unique to SURGE (1940-1978)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |100.6|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1979|| [MilSPG79]
 |-
-!CD 100.5|| "J" Carrier|| Midspan Transposition|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |101|| Pony|| Telephone|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921).  Embossing BROOKFIELD only.|| 1973|| [GIaCR]
 |-
-!CD 100.6|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1979|| 1979 Milholland's Suggested Insulator Price Guide
+| align="left" |102|| Pony|| Telephone|| Pony|| 1878|| 1912>|| <ref>CD 102 Per N.R. Woodward on Hemingray</ref>|| Made by CALIFORNIA (1912-1916)|| 1967|| [NRW67]
 |-
-!CD 101|| Pony|| Telephone|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921).  Embossing BROOKFIELD only.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |102.3|| &nbsp;|| Telephone|| &nbsp;|| 1890|| 1897|| &nbsp;|| NO NAME or K.C.G.W. (1890-1897).  NO NAME of KCGW origin per McDougalds.|| 1973|| [GIaCR]
 |-
-!CD 102|| Pony|| Telephone|| Pony|| 1878|| &nbsp;|| Per N.R. Woodward on Hemingray|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |102.4|| &nbsp;|| Telephone|| &nbsp;|| 1883>|| 1888<|| <ref>CD 102.4 a product of the Lyndeborough Glass Company, South Lyndeboro, New Hampshire (1866-1888). Many shards have been found by a digger at the old glassworks site.  Per David Whitten, 10/12/2009 email.</ref>|| Unique to NEW ENG.TEL.& TEL.CO.|| 1976|| [Mil76]
+|- style="background:#E0E0E0;"
+|align="left" |102.7|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  No other reference.  Re-assigned to CD 140.5
 |-
-!CD 102.3|| &nbsp;|| Telephone|| &nbsp;|| 1890|| 1897|| &nbsp;|| NO NAME or K.C.G.W. (1890-1897).  NO NAME of KCGW origin per McDougalds.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |103|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME  B  or GAYNER (1920-1923)|| 1967|| [NRW67]
 |-
-!CD 102.4|| &nbsp;|| Telephone|| &nbsp;|| 1883>|| 1899<|| &nbsp;|| Unique to NEW ENG.TEL.& TEL.CO.  Manufactured by an unknown New England manufacturer according to McDougalds.|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |103.4|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 102.7|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  No other reference.  Re-assigned to CD 140.5
+| align="left" |104|| National Pony|| Telephone|| &nbsp;|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 103|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME  B  or GAYNER (1920-1923)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |105|| &nbsp;|| Telephone|| &nbsp;|| 1883|| 1886|| &nbsp;|| NO EMBOSSING or AM.INSULATOR CO. (1883-1886).  NO EMBOSSING an American product per McDougalds.|| 1973|| [GIaCR]
 |-
-!CD 103.4|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |106|| Pony|| Telephone|| Pony|| 1892~|| 1955|| <ref>"The CD 106 Hemingray-9 was introduced in either 1892 or 1893 and continued in production until at least the early 1950's (my example is 1951) until replaced by the CD 107 Hemingray-9 in 1956." Per Bob Stahr, 09/12/2007 email on ICON.</ref><ref>CD 106 Per N.R. Woodward on Hemingray</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 104|| National Pony|| Telephone|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |106.1|| Pony|| Telephone|| &nbsp;|| 1885|| 1895|| &nbsp;|| Unique to DUQUESNE|| 1988|| [NRW88]
 |-
-!CD 105|| &nbsp;|| Telephone|| &nbsp;|| 1883|| 1886|| &nbsp;|| NO EMBOSSING or AM.INSULATOR CO. (1883-1886).  NO EMBOSSING an American product per McDougalds.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |106.2|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to P.S.S.A.|| 1976|| [Mil76]
 |-
-!CD 106|| Pony|| Telephone|| Pony|| 1900|| 1955|| Per N.R. Woodward on Hemingray|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |106.3|| &nbsp;|| Telephone|| &nbsp;|| 1885|| 1895|| &nbsp;|| DUQUESNE or NO EMBOSSING.  NO EMBOSSING a Duquesne product.|| 1976|| [Mil76]
 |-
-!CD 106.1|| Pony|| Telephone|| &nbsp;|| 1885|| 1895|| &nbsp;|| Unique to DUQUESNE|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |106.4|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING - MEXICO|| 1969|| Originally CD 406.  [NRW69]
 |-
-!CD 106.2|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to P.S.S.A.|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |106.5|| &nbsp;|| Telephone|| &nbsp;|| 1940|| 1959|| &nbsp;|| Unique to CRISOL TEXCOCO|| 1988|| [NRW88]
 |-
-!CD 106.3|| &nbsp;|| Telephone|| &nbsp;|| 1885|| 1895|| &nbsp;|| DUQUESNE or NO EMBOSSING.  NO EMBOSSING a Duquesne product.|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |107|| Pony|| Telephone|| &nbsp;|| 1924>|| 1969<|| &nbsp;|| Start date based on ¸ marking  end date based on Armstrong marking.  All others fall within range.|| 1967|| [NRW67]
 |-
-!CD 106.4|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING - MEXICO|| 1969|| Originally CD 406.  The Glass Insulator in America 1969 Report
+| align="left" |107.2|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76].  Not listed in 1979 Price Guide
 |-
-!CD 106.5|| &nbsp;|| Telephone|| &nbsp;|| 1940|| 1959|| &nbsp;|| Unique to CRISOL TEXCOCO|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |108|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [NRW69]
 |-
-!CD 107|| Pony|| Telephone|| &nbsp;|| 1924>|| 1969<|| &nbsp;|| Start date based on ¸ marking  end date based on Armstrong marking.  All others fall within range.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |109|| Fiske & Mott Pony|| Telephone|| Teardrop Pony or Chicago Teardrop Pony|| 1893|| 1894|| &nbsp;|| Unique to CHICAGO INSULATING CO. (1893-1894)|| 1973|| [GIaCR] (listed as CD 105  probably a typo)
 |-
-!CD 107.2|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |109.5|| Harloe's Patent|| Telephone|| Claw|| 1902|| 1906|| &nbsp;|| Unique to HARLOE » (1902-1906)|| 1969|| Originally CD 409.  [NRW69]
 |-
-!CD 108|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |109.7|| &nbsp;|| &nbsp;|| Johnson & Watson|| 1908|| &nbsp;|| &nbsp;|| Unique to JOHNSON & WATSON  Pat'd 1908|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 109|| Fiske & Mott Pony|| Telephone|| Teardrop Pony or Chicago Teardrop Pony|| 1893|| 1894|| &nbsp;|| Unique to CHICAGO INSULATING CO. (1893-1894)|| 1973|| The Glass Insulator  A Comprehensive Reference (listed as CD 105  probably a typo)
+| align="left" |109.9|| &nbsp;|| &nbsp;|| Ram's Head|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to PAT APP FOR|| 1976?|| [Mil76].  Listed in 1979 and 1995 Price Guides
 |-
-!CD 109.5|| Harloe's Patent|| Telephone|| Claw|| 1902|| 1906|| &nbsp;|| Unique to HARLOE » (1902-1906)|| 1969|| Originally CD 409.  The Glass Insulator in America 1969 Report
+| align="left" |110|| Pony External Thread|| Telephone|| Spiral Groove or Screw Top|| 1907|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)  Pat'd 1907|| 1967|| [NRW67]
 |-
-!CD 109.7|| &nbsp;|| &nbsp;|| Johnson & Watson|| 1908|| &nbsp;|| &nbsp;|| Unique to JOHNSON & WATSON  Pat'd 1908|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |110.5|| &nbsp;|| Telephone|| Corkscrew or Screw Top|| 1884|| 1886|| &nbsp;|| Unique to NATIONAL INSULATOR CO. (1884-1886)|| 1973|| [GIaCR]
 |-
-!CD 109.9|| &nbsp;|| &nbsp;|| Ram's Head|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to PAT APP FOR|| 1976?|| Millhollands Most About Glass Insulators Bicentennial Edition.  Listed in 1979 and 1995 Price Guides
+| align="left" |110.6|| &nbsp;|| Telephone|| Corkscrew or Screw Top|| 1884|| 1886|| &nbsp;|| Unique to NATIONAL INSULATOR CO. (1884-1886)|| 1976|| [Mil76]
 |-
-!CD 110|| Pony External Thread|| Telephone|| Spiral Groove or Screw Top|| 1907|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)  Pat'd 1907|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |111|| Carrier|| Telephone|| &nbsp;|| 1926|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1976|| [Mil76]
 |-
-!CD 110.5|| &nbsp;|| Telephone|| Corkscrew or Screw Top|| 1884|| 1886|| &nbsp;|| Unique to NATIONAL INSULATOR CO. (1884-1886)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |112|| Pony Double Groove|| Telephone|| Keg or Exchange|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 110.6|| &nbsp;|| Telephone|| Corkscrew or Screw Top|| 1884|| 1886|| &nbsp;|| Unique to NATIONAL INSULATOR CO. (1884-1886)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |112.4|| &nbsp;|| Telephone|| Exchange|| 1890>|| 1933<|| &nbsp;|| Based on ????|| 1973|| [GIaCR]
+|- style="background:#E0E0E0;"
+| align="left" |112.5|| &nbsp;|| Telephone|| Exchange|| &nbsp;|| &nbsp;|| <ref>CD 112.5 McDougald's 2003  combined w/CD 112.4</ref>|| NO EMBOSSING or NO NAME  Canadians|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 111|| Carrier|| Telephone|| &nbsp;|| 1926|| 1941<|| Start date based on McDougalds.|| Unique to PYREX (1924-1941).|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |113|| Pony Double Groove|| Telephone|| Keg or Exchange|| 1886>|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 112|| Pony Double Groove|| Telephone|| Keg or Exchange|| 1886>|| &nbsp;|| 1912< Brookfield 1912 Catalog|| Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |113.2|| &nbsp;|| Telephone|| Exchange|| 1885|| 1895|| &nbsp;|| DUQUESNE or NO NAME|| 1976|| [Mil76]
+|- style="background:#E0E0E0;"
+| align="left" |113.4|| &nbsp;|| &nbsp;|| Exchange|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  No other reference.  Probably foreign -- CTRG in Milholland's 1976
 |-
-!CD 112.4|| &nbsp;|| Telephone|| Exchange|| 1890>|| 1933<|| &nbsp;|| Based on ????|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |114|| Pony Double Groover|| Telephone|| Keg or Exchange|| 1886>|| 1920~|| &nbsp;|| Unique to HEMINGRAY (1865-1970).|| 1967|| [NRW67]
 |-
-!CD 112.5|| &nbsp;|| Telephone|| Exchange|| &nbsp;|| &nbsp;|| McDougald's 2003  combined w/CD 112.4|| NO EMBOSSING or NO NAME  Canadians|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |114.2|| &nbsp;|| Telephone|| Exchange|| 1893|| 1894|| &nbsp;|| Unique to STANDARD GLASS INSULATOR CO. (1893-1894)|| 1976|| [Mil76]
 |-
-!CD 113|| Pony Double Groove|| Telephone|| Keg or Exchange|| 1886>|| &nbsp;|| &nbsp;|| Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |115|| Exchange|| Telephone|| Exchange|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 113.2|| &nbsp;|| Telephone|| Exchange|| 1885|| 1895|| &nbsp;|| DUQUESNE or NO NAME|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |115.1|| &nbsp;|| Telephone|| &nbsp;|| 1886>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING.|| 1988|| [NRW88]
 |-
-!CD 113.4|| &nbsp;|| &nbsp;|| Exchange|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  No other reference.  Probably foreign -- CTRG in Milholland's 1976
+| align="left" |116|| Large Double Groove|| Telephone|| Three Rumple|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 114|| Pony Double Groover|| Telephone|| Keg or Exchange|| 1886>|| 1920~|| &nbsp;|| Unique to HEMINGRAY (1865-1970).  Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |116.5|| Double Groove|| &nbsp;|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to B|| 1973|| [GIaCR]
 |-
-!CD 114.2|| &nbsp;|| Telephone|| Exchange|| 1893|| 1894|| &nbsp;|| Unique to STANDARD GLASS INSULATOR CO. (1893-1894)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |117|| Twisted Pair|| Telephone|| &nbsp;|| 1886>|| 1912>|| &nbsp;|| Unique to NO NAME.|| 1967|| [NRW67]
 |-
-!CD 115|| Exchange|| Telephone|| Exchange|| 1886>|| &nbsp;|| 1912< Brookfield 1912 Catalog|| Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |118|| &nbsp;|| Telephone|| &nbsp;|| 1928>|| 1969<|| &nbsp;|| Unique to NO EMBOSSING.  Hemingray dump item  start date based on use of carnival.|| 1973|| [GIaCR]
 |-
-!CD 115.1|| &nbsp;|| Telephone|| &nbsp;|| 1886>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING.  Start date based on origin of transposition theory.|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |119|| O'Brien Patent|| Telephone|| O'Brien|| 1885|| 1903<|| &nbsp;|| Unique to BROOKFIELD (1869-1921) (Pat'd 1885).  End based on use of "W" in embossing.|| 1967|| [NRW67]
 |-
-!CD 116|| Large Double Groove|| Telephone|| Three Rumple|| 1886>|| &nbsp;|| 1912< Brookfield 1912 Catalog|| Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |120|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [NRW69]
+|- style="background:#E0E0E0;"
+| align="left" |120.2|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PAT APP FOR or PONY|| 1973|| [GIaCR].  Combined with CD 120 in 2003 McDougald's Price Guide.
 |-
-!CD 116.5|| Double Groove|| &nbsp;|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to B|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |121|| Toll|| Telephone|| Toll|| 1880s|| 1935>|| <ref name="woodward20091214a">"CD #121 was the original AT&T long distance style used starting with the first long lines in the 1880s.  Until WWI it was esssentially unchanged." N.R. Woodward on ICON, 12/14/2009.</ref>|| Made by STANDARD GLASS INSULATOR CO (1893-1894) and MAYDWELL (1935-1940)|| 1967|| [NRW67]
 |-
-!CD 117|| Twisted Pair|| Telephone|| &nbsp;|| 1886>|| &nbsp;|| 1912< Brookfield 1912 Catalog|| Unique to NO NAME.  Start date based on origin of transposition theory.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |121.4|| American Union|| Telegraph|| &nbsp;|| 1871>|| 1893<|| &nbsp;|| Unique to A.U.  all have Pat'd 1871.  End date based on absence of May 2 1893 patent date.|| 1973|| [GIaCR]
 |-
-!CD 118|| &nbsp;|| Telephone|| &nbsp;|| 1928>|| 1969<|| &nbsp;|| Unique to NO EMBOSSING.  Hemingray dump item  start date based on use of carnival.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |122|| Toll|| Telephone|| Toll|| 1919~|| 1969>|| <ref name="woodward20091214b">"CD #122 came along in 1919-20, the change in design was the larger square wire groove;  and corresponding greater outward slant to the skirt and slightly greater base width"  N.R. Woodward on ICON, 12/14/2009.</ref>|| Made by MCLAUGHLIN (1925-1935) and KERR (1969-1975)|| 1967|| [NRW67]
 |-
-!CD 119|| O'Brien Patent|| Telephone|| O'Brien|| 1885|| 1903<|| Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921) (Pat'd 1885).  End based on use of "W" in embossing.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |122.4|| CW Carrier|| Telephone|| 1941<|| 1924>|| &nbsp;|| &nbsp;|| PYREX (1924-1941) or HEMINGRAY (1865-1970)|| 1973|| [GIaCR]
 |-
-!CD 120|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |123|| &nbsp;|| Telegraph|| &nbsp;|| 1870|| 1880|| &nbsp;|| Unique to E.C.& M.CO. (1870-1880)|| 1969|| [NRW69]
 |-
-!CD 120.2|| Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PAT APP FOR or PONY|| 1973|| The Glass Insulator  A Comprehensive Reference.  Combined with CD 120 in 2003 McDougald's Price Guide.
+| align="left" |123.2|| &nbsp;|| Telegraph|| &nbsp;|| 1870|| 1879<|| &nbsp;|| Unique to CHESTER (1855-1879) (Pat'd 1870 date)|| 1988|| [NRW88]
 |-
-!CD 121|| Toll|| Telephone|| Toll|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |124|| National Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 121.4|| American Union|| Telegraph|| &nbsp;|| 1871>|| 1893<|| &nbsp;|| Unique to A.U.  all have Pat'd 1871.  End date based on absence of May 2 1893 patent date.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |124.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1871~|| 1873~|| <ref name="burger20091015">" Hemingray offered their smallest "bullet", the CD 124.1 probably as early as the 1871 Patent they wear.  It is believed the 124.2 superseded the .1 as early as 1873, with the 124.3 being offered by about the time the very first Brookfield produced "pony" was introduced in the July, 1878 Tillotson catalogue." Brent Burger in ICON 2009.10.15 digest.</ref>|| Unique to PATENT - DEC. 19  1871 || &nbsp;||
 |-
-!CD 122|| Toll|| Telephone|| Toll|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |124.2|| &nbsp;|| Telephone|| &nbsp;|| 1873~|| &nbsp;|| <ref name="burger20091015" />|| Unique to PATENT - DEC. 19  1871|| 1973|| [GIaCR]
 |-
-!CD 122.4|| CW Carrier|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PYREX (1924-1941) or HEMINGRAY (1865-1970)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |124.3|| &nbsp;|| Telephone|| &nbsp;|| 1878~|| &nbsp;|| <ref name="burger20091015" />|| Unique to PATENT - DEC. 19  1871|| 1973|| [GIaCR]
 |-
-!CD 123|| &nbsp;|| Telegraph|| &nbsp;|| 1870|| 1880|| &nbsp;|| Unique to E.C.& M.CO. (1870-1880)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |124.5|| &nbsp;|| Lightning Rod|| Wing Chambers|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| [GIaCR]
 |-
-!CD 123.2|| &nbsp;|| Telegraph|| &nbsp;|| 1870|| 1879<|| &nbsp;|| Unique to CHESTER (1855-1879) (Pat'd 1870 date)|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |125|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 124|| National Pony|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |126|| Western Union|| Telegraph|| Blob Top|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 124.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |126.1|| &nbsp;|| Telegraph|| &nbsp;|| 1870>|| 1882<|| &nbsp;|| Unique to BROOKFIELD (1869-1921) (Pat'd 1870 date).  End date based on all embossings with 55 FULTON ST.|| 1979|| [MilSPG79]
 |-
-!CD 124.2|| &nbsp;|| Telephone|| &nbsp;|| 1871>|| &nbsp;|| &nbsp;|| Unique to PATENT - DEC. 19  1871|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |126.3|| American Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921)  A.U. or NO NAME|| 1969|| Originally CD 427?  [NRW69]
 |-
-!CD 124.3|| &nbsp;|| Telephone|| &nbsp;|| 1871>|| &nbsp;|| &nbsp;|| Unique to PATENT - DEC. 19  1871|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |126.4|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| AM.INSULATOR CO. (1883-1886) or W.E.MFG.CO.|| 1969|| Originally CD 426.  [NRW69]
 |-
-!CD 124.5|| &nbsp;|| Lightning Rod|| Wing Chambers|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |127|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [NRW69]
 |-
-!CD 125|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |127.4|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - DEC. 19  1871 or NO EMBOSSING|| 1976|| [Mil76]
+|- style="background:#E0E0E0;"
+| align="left" |127.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79] listed as a Boston.  Also in Millhollands. Dropped in favor of CD 143.6.
 |-
-!CD 126|| Western Union|| Telegraph|| Blob Top|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |128|| CS Carrier|| Telephone|| &nbsp;|| 1941<|| 1969>|| &nbsp;|| Made by PYREX (1924-1941) and KERR (1969-1975)||  1967|| [NRW67]
 |-
-!CD 126.1|| &nbsp;|| Telegraph|| &nbsp;|| 1870>|| 1882<|| &nbsp;|| Unique to BROOKFIELD (1869-1921) (Pat'd 1870 date).  End date based on all embossings with 55 FULTON ST.|| 1979|| 1979 Milholland's Suggested Insulator Price Guide
+| align="left" |128.4|| Carrier|| Telephone|| Big Mouth|| 1933|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970).  Start date based on use of mold number|| 1969|| Originally CD 428.  [NRW69]
 |-
-!CD 126.3|| American Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921)  A.U. or NO NAME|| 1969|| Originally CD 427?  The Glass Insulator in America 1969 Report
+| align="left" |129|| TS Carrier|| Telephone|| &nbsp;|| 1954|| 1975<|| <ref>CD #129 should have a date of 1954.  First ones were made that year by both Owens and Armstrong.  The single-page brochure I have advertising the "TS" as a "new insulator" has a print date of 1955.  Per N.R. Woodward on ICON, 10/16/2009</ref><ref>End date based on Kerr production.</ref>|| 1967|| [NRW67]
 |-
-!CD 126.4|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| AM.INSULATOR CO. (1883-1886) or W.E.MFG.CO.|| 1969|| Originally CD 426.  The Glass Insulator in America 1969 Report
+| align="left" |130|| &nbsp;|| Telegraph|| &nbsp;|| 1877>|| 1908<|| &nbsp;|| Unique to CAL.ELEC.WORKS (1877-1908)|| 1969|| [NRW69]
 |-
-!CD 127|| Western Union|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |130.1|| &nbsp;|| Telegraph|| &nbsp;|| 1877>|| 1908<|| &nbsp;|| Unique to CAL.ELEC.WORKS (1877-1908)|| 1973|| [GIaCR].  Not listed in Woodward's 1988 Report
 |-
-!CD 127.4|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - DEC. 19  1871 or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |130.2|| &nbsp;|| &nbsp;|| Seilers|| 1877|| &nbsp;|| &nbsp;|| Unique to SEILERS  Pat'd 1877  probably made by Hemingray|| 1979|| [MilSPG79]
 |-
-!CD 127.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide listed as a Boston.  Also in Millhollands. Dropped in favor of CD 143.6.
+| align="left" |131|| &nbsp;|| Telegraph|| &nbsp;|| 1865>|| 1890<|| &nbsp;|| Dates based on Brookfield embossings.  NO NAME insulators ignored.|| 1967|| [NRW67]
 |-
-!CD 128|| CS Carrier|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |131.4|| &nbsp;|| Telegraph|| &nbsp;|| 1875<|| &nbsp;|| &nbsp;|| Start date based on manufacture by Tillotson|| 1969|| Originally CD 431.  [NRW69]
 |-
-!CD 128.4|| Carrier|| Telephone|| Big Mouth|| 1933|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970).  Start date based on use of mold number|| 1969|| Originally CD 428.  The Glass Insulator in America 1969 Report
+| align="left" |131.8|| &nbsp;|| Telegraph|| &nbsp;|| 1869|| 1879|| <ref name="paisley">See Jan, 2007 CJ (http://www.cjow.com/archive/article.php?month=1&a=01paisley_insulators.htm&year=2007).  Unique to Paisley insulators.</ref> || Unique to NO EMBOSSING|| 1976|| [Mil76].  Not listed in 1979 Price Guide
 |-
-!CD 129|| TS Carrier|| Telephone|| &nbsp;|| 1933>|| 1975<|| &nbsp;|| Start date based on use of mold numbers by Hemingray  end date based on Kerr production.  All other embossings fall in this range.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |132|| &nbsp;|| Telegraph|| Bullet|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [NRW69]
 |-
-!CD 130|| &nbsp;|| Telegraph|| &nbsp;|| 1877>|| 1908<|| &nbsp;|| Unique to CAL.ELEC.WORKS (1877-1908)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |132.2|| &nbsp;|| Telegraph|| &nbsp;|| 1869|| 1879|| <ref name="paisley" />|| PAISLEY or NO NAME|| 1976|| [Mil76]
 |-
-!CD 130.1|| &nbsp;|| Telegraph|| &nbsp;|| 1877>|| 1908<|| &nbsp;|| Unique to CAL.ELEC.WORKS (1877-1908)|| 1973|| The Glass Insulator  A Comprehensive Reference.  Not listed in Woodward's 1988 Report
+| align="left" |132.4|| &nbsp;|| Lightning Rod|| Chambers Companion|| 1877|| &nbsp;|| &nbsp;|| Unique to PATENT - DEC. 19  1871  Pat'd 1877|| 1973|| [GIaCR]
 |-
-!CD 130.2|| &nbsp;|| &nbsp;|| Seilers|| 1877|| &nbsp;|| &nbsp;|| Unique to SEILERS  Pat'd 1877  probably made by Hemingray|| 1979|| 1979 Milholland's Suggested Insulator Price Guide
+| align="left" |133|| Regular|| Telegraph  Telephone|| Bullet|| 1906<|| 1912>||  &nbsp;|| Made by O.V.G. CO. (1903-1906)||1967|| [NRW67]
 |-
-!CD 131|| &nbsp;|| Telegraph|| &nbsp;|| 1865>|| 1890<|| &nbsp;|| Dates based on Brookfield embossings.  NO NAME insulators ignored.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |133.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1897|| &nbsp;|| <ref>CD 133.1 Included in 1897 Electrical Appliance Catalog</ref>|| &nbsp;|| 1990|| [McD]
 |-
-!CD 131.4|| &nbsp;|| Telegraph|| &nbsp;|| 1875<|| &nbsp;|| &nbsp;|| Start date based on manufacture by Tillotson|| 1969|| Originally CD 431.  The Glass Insulator in America 1969 Report
+| align="left" |133.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1973|| [GIaCR]
 |-
-!CD 131.8|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |133.3|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| [Mil76]
 |-
-!CD 132|| &nbsp;|| Telegraph|| Bullet|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |133.4|| &nbsp;|| Telegraph|| Bullet|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [Mil76]
 |-
-!CD 132.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PAISLEY or NO NAME|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |133.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to TEL.FED.MEX|| 1990|| [McD]
 |-
-!CD 132.4|| &nbsp;|| Lightning Rod|| Chambers Companion|| 1877|| &nbsp;|| &nbsp;|| Unique to PATENT - DEC. 19  1871  Pat'd 1877|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |134|| Deep Groove|| &nbsp;|| &nbsp;|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 133|| Regular|| Telegraph  Telephone|| Bullet|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |134.4|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 133.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1897|| &nbsp;|| Included in 1897 Electrical Appliance Catalog|| &nbsp;|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |134.6|| Philadelphia|| &nbsp;|| Mad Hatter|| 1896|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)  Pat'd 1896|| 1972|| Originally "temporary CD 430" [Mil72]
 |-
-!CD 133.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |135|| Fiske & Mott Regular|| &nbsp;|| Chicago Diamond Groove|| 1893|| 1894|| &nbsp;|| Unique to CHICAGO INSULATING CO. (1893-1894)|| 1969|| [NRW69]
 |-
-!CD 133.3|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |135.5|| &nbsp;|| Telegraph|| &nbsp;|| 1861>|| &nbsp;|| &nbsp;|| Unique to ERW|| 1973|| [GIaCR]
 |-
-!CD 133.4|| &nbsp;|| Telegraph|| Bullet|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |136|| B&O|| Telegraph|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| BROOKFIELD (1869-1921) or B & O|| 1969|| [NRW69]
 |-
-!CD 133.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to TEL.FED.MEX|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |136.4|| &nbsp;|| Telegraph|| Canadian Boston|| 1879<|| 1872>|| <ref>The versions with segmented threads are through to have been made by Boston Bottle Works, or Bay State Glass Works, active from 1872-1879.  See http://cjow.com/archive/article.php?month=8&a=08Patent%20Pages.htm&year=1979 , http://cjow.com/archive/article.php?month=9&a=09Samuel%20Oakman%20and%20Boston%20Insulator%20Production.htm&year=1988 , and http://cjow.com/archive/article.php?month=6&a=06Boston%20Family%20Album.htm&year=2004</ref>|| NO EMBOSSING or NO NAME|| 1976|| [Mil76]
 |-
-!CD 134|| Deep Groove|| &nbsp;|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |136.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1990|| [McD]
 |-
-!CD 134.4|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |136.7|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - OTHER (1880-1881) or NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 134.6|| Philadelphia|| &nbsp;|| Mad Hatter|| 1896|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)  Pat'd 1896|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |137|| &nbsp;|| Secondary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |137.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's.  Deleted as a fake.
 |-
-!CD 135|| Fiske & Mott Regular|| &nbsp;|| Chicago Diamond Groove|| 1893|| 1894|| &nbsp;|| Unique to CHICAGO INSULATING CO. (1893-1894)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |137.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 135.5|| &nbsp;|| Telegraph|| &nbsp;|| 1861>|| &nbsp;|| &nbsp;|| Unique to ERW|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |138|| Postal Telegraph|| &nbsp;|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 136|| B&O|| Telegraph|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| BROOKFIELD (1869-1921) or B & O|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |138.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| [Mil76]
 |-
-!CD 136.4|| &nbsp;|| Telegraph|| Canadian Boston|| &nbsp;|| &nbsp;|| &nbsp;|| NO EMBOSSING or NO NAME|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |138.9|| &nbsp;|| &nbsp;|| Twin Pin|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| [Mil76]
 |-
-!CD 136.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |139|| Combination Safety|| &nbsp;|| Combination Safety|| 1903|| 1912>|| &nbsp;|| Unique to COMBINATION SAFETY  Pat'd 1903|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |139.6|| &nbsp;|| Secondary|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 136.7|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - OTHER (1880-1881) or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |139.8|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 137|| &nbsp;|| Secondary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |139.9|| USLD|| &nbsp;|| &nbsp;|| 1925|| 1930|| &nbsp;|| Unique to M„LAUGHLIN (1925-1935)|| 1969|| Originally CD 439.  [NRW69]
 |-
-!CD 137.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's.  Deleted as a fake.
+| align="left" |140|| Jumbo|| Feeder Cable|| Jumbo|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 137.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |140.5|| &nbsp;|| &nbsp;|| Cobalt Blob|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1976|| Previously CD 102.7  [Mil76].  Not listed in 1979 Price Guide
 |-
-!CD 138|| Postal Telegraph|| &nbsp;|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |141|| &nbsp;|| Telephone|| Hot Cross Bun or Crosstop|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1969|| [NRW69]
 |-
-!CD 138.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |141.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1995|| [McDPG95]
 |-
-!CD 138.9|| &nbsp;|| &nbsp;|| Twin Pin|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |141.6|| &nbsp;|| &nbsp;|| Blackburn|| 1893|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER  Pat'd 1893|| 1990|| [McD]
 |-
-!CD 139|| Combination Safety|| &nbsp;|| Combination Safety|| 1903|| 1912>|| Brookfield 1912 Catalog|| Unique to COMBINATION SAFETY  Pat'd 1903|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |141.7|| &nbsp;|| &nbsp;|| Twiggs|| 1905|| &nbsp;|| &nbsp;|| Unique to TWIGGS  Pat'd 1905|| 1988|| [NRW88]
 |-
-!CD 139.6|| &nbsp;|| Secondary|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |141.8|| &nbsp;|| &nbsp;|| Buzby|| 1890|| &nbsp;|| &nbsp;|| Unique to BUZBY  Pat'd 1890|| 1976|| Originally CD 109.9.  [Mil76].  Not listed in 1979 Report
 |-
-!CD 139.8|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |141.9|| &nbsp;|| &nbsp;|| Emmingers|| 1872|| &nbsp;|| &nbsp;|| Unique to EMMINGER  Pat'd 1872|| 1976|| [Mil76]
 |-
-!CD 139.9|| USLD|| &nbsp;|| &nbsp;|| 1925|| 1930|| &nbsp;|| Unique to M„LAUGHLIN (1925-1935)|| 1969|| Originally CD 439.  The Glass Insulator in America 1969 Report
+| align="left" |142|| W.U. Iridized|| Telegraph|| &nbsp;|| 1939|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO NAME  Pat'd 1939|| 1967|| [NRW67]
 |-
-!CD 140|| Jumbo|| Feeder Cable|| Jumbo|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |142.4|| &nbsp;|| Telegraph|| &nbsp;|| 1939|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING  Pat'd 1939|| 1976|| [Mil76]
 |-
-!CD 140.5|| &nbsp;|| &nbsp;|| Cobalt Blob|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1976|| Previously CD 102.7  Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |143|| Dwight Pattern|| Telegraph|| &nbsp;||<I>1875</I>||<I>1906></I>||<ref>Unsure when Canadian glass houses started using threads, but likely in the 1870s.  All Dwight Patterns are thought to be Brookfield products, but were never made in Old Bridge colors.  This implies these stopped being made by 1906.  Other CD 143s could have been made later.</ref><ref>per Barret Nicpon, 8/15/2016 on ICON: As far as the Dwight CD-143 use era, I would suggest that a general
+turn-of-century window is probably appropriate for these pieces. This isn't
+based on any written or historical data, but rather on my own digging
+experience. They seem to have begun to be used sometime in perhaps the
+mid-to-late 1890s, and their use was probably truncated by the beginnings
+of G.N.W. TEL. CO. CD-145 production. These seem to have been in prolific
+use by the early 1900s. I can't personally offer much assurance on the
+accuracy of these dates, unfortunately.
+As far as the use of threadless in Canada goes, I believe the magic date
+for the switchover to threaded glass took place around 1875-1877, depending
+on the company and individual line. Again, this is based on my own personal
+experience of line construction dates compared with digging finds. This is
+also based on correspondence with other collectors who have indicated
+threadless glass can be found on even newer lines on rare occasions. This,
+I assume, is an example of a frugal line superintendent or telegraph
+company continuing to re-use new-old-stock insulators into more modern
+eras. Overwhelmingly, it seems threadless were no longer being used by the
+beginning of 1877 and had been replaced by early 143s, such as threaded
+.x, Montreal Telegraph CD-143s, and other unembossed 143s.</ref>|| &nbsp;|| 1969|| [NRW69]
 |-
-!CD 141|| &nbsp;|| Telephone|| Hot Cross Bun or Crosstop|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |143.4|| &nbsp;|| Telegraph|| &nbsp;|| 1883|| 1886|| <ref>CD 143.4 McDougald's states that manufactured at similar time to CD 145</ref>.|| AM.INSULATOR CO. (1883-1886) or BROOKFIELD (1869-1921).|| 1976|| [Mil76]
 |-
-!CD 141.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1995|| 1995 Price Guide for Insulators
+| align="left" |143.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1883|| 1892|| &nbsp;|| Unique to T-H.E.CO. (1883-1892)|| 1973|| [GIaCR]
 |-
-!CD 141.6|| &nbsp;|| &nbsp;|| Blackburn|| 1893|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER  Pat'd 1893|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |143.6|| &nbsp;|| Telegraph|| &nbsp;|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 141.7|| &nbsp;|| &nbsp;|| Twiggs|| 1905|| &nbsp;|| &nbsp;|| Unique to TWIGGS  Pat'd 1905|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |144|| Foree Bain Patent|| &nbsp;|| Foree Bain|| 1890|| &nbsp;|| &nbsp;|| Pat'd 1890  Patent assigned to Hemingray 1901|| 1969|| [NRW69]
 |-
-!CD 141.8|| &nbsp;|| &nbsp;|| Buzby|| 1890|| &nbsp;|| &nbsp;|| Unique to BUZBY  Pat'd 1890|| 1976|| Originally CD 109.9.  Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Report
+| align="left" |144.5|| &nbsp;|| &nbsp;|| Beehive|| 1890>|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER (1890 Date)|| 1973|| [GIaCR]
 |-
-!CD 141.9|| &nbsp;|| &nbsp;|| Emmingers|| 1872|| &nbsp;|| &nbsp;|| Unique to EMMINGER  Pat'd 1872|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |145|| &nbsp;|| Telegraph|| &nbsp;|| 1883~|| 1947>|| <ref>CD 145 Probably first made by AMERICAN.  Hemi clear units made at least until 1947.</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 142|| W.U. Iridized|| Telegraph|| &nbsp;|| 1939|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO NAME  Pat'd 1939|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |145.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 142.4|| &nbsp;|| Telegraph|| &nbsp;|| 1939|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING  Pat'd 1939|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |145.6|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING|| 1973|| [GIaCR]
+|- style="background:#E0E0E0;"
+| align="left" |146|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unnamed unit|| &nbsp;|| No Known Examples
 |-
-!CD 143|| Dwight Pattern|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |146.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1988|| [NRW88]
 |-
-!CD 143.4|| &nbsp;|| Telegraph|| &nbsp;|| 1883|| 1886|| McDougald's states that both manufactured at similar time.|| AM.INSULATOR CO. (1883-1886) or BROOKFIELD (1869-1921).|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |146.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING|| 1976|| [Mil76].  Not listed in 1979 Price Guide
 |-
-!CD 143.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1883|| 1892|| &nbsp;|| Unique to T-H.E.CO. (1883-1892)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |147|| Barclay Patent|| Telegraph|| Spiral Groove or Screw Top|| 1907|| 1912>|| &nbsp;|| Pat'd 1907|| 1967|| [NRW67]
 |-
-!CD 143.6|| &nbsp;|| Telegraph|| &nbsp;|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |148|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| [McDPG03]
 |-
-!CD 144|| Foree Bain Patent|| &nbsp;|| Foree Bain|| 1890|| &nbsp;|| &nbsp;|| Pat'd 1890  Patent assigned to Hemingray 1901|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |149|| Burbrook|| &nbsp;|| Burbrook|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921) or NO EMBOSSING|| 1969|| [NRW69]
 |-
-!CD 144.5|| &nbsp;|| &nbsp;|| Beehive|| 1890>|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER (1890 Date)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |150|| Deep Groove DP External Thread|| &nbsp;|| Spiral Groove or Barclay or Screw Top|| 1907|| 1912>|| &nbsp;|| BROOKFIELD (1869-1921) or BARCLAY  Pat'd 1907|| 1967|| [NRW67]
 |-
-!CD 145|| &nbsp;|| Telegraph|| &nbsp;|| 1912<|| 1912>||  Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |151|| ell Double Petticoat|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 145.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |152|| New Western Union|| Telegraph & Telephone|| Hoopskirt|| 1910 || 1921>|| <ref name="hemi1946">1946 Hemingray Catalog</ref> || &nbsp;|| 1967|| [NRW67]
 |-
-!CD 145.6|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |152.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 146|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| Woodward's 1967|| Unnamed unit|| &nbsp;|| Never Officially Assigned
+| align="left" |153|| &nbsp;|| Telegraph & Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 146.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |154|| Double Petticoat|| Telegraph & Telephone|| &nbsp;|| 1921|| 1967<|| <ref name="hemi1946" />|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 146.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |154.3|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 147|| Barclay Patent|| Telegraph|| Spiral Groove or Screw Top|| 1907|| &nbsp;|| 1912> Brookfield 1912 Catalog|| Pat'd 1907|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |154.5|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| DERFLINGHER or NO NAME - MEXICO|| 1969|| Originally CD 454.  [NRW69]
 |-
-!CD 148|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 2003 Price Guide
+| align="left" |154.7|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 149|| Burbrook|| &nbsp;|| Burbrook|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921) or NO EMBOSSING|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |155|| &nbsp;|| Telegraph & Telephone|| &nbsp;|| 1938|| 1978|| <ref>CD 155 Per N.R. Woodward on Hemingray</ref><ref>CD 155 KERR known with 1978 date code</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 150|| Deep Groove DP External Thread|| &nbsp;|| Spiral Groove or Barclay or Screw Top|| 1907|| &nbsp;|| 1912> Brookfield 1912 Catalog|| BROOKFIELD (1869-1921) or BARCLAY  Pat'd 1907|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |155.6|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 151|| ell Double Petticoat|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |156|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| [NRW69]
 |-
-!CD 152|| New Western Union|| Telegraph & Telephone|| Hoopskirt|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |156.1|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| [Mil76]
 |-
-!CD 152.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |156.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - OTHER or NO EMBOSSING|| 1976|| [Mil76].  Not listed in 1979 Price Guide OR Woodward's 1988 Report
 |-
-!CD 153|| &nbsp;|| Telegraph & Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |157|| &nbsp;|| Telegraph|| Teepee|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921) or HEMINGRAY (1865-1970)|| 1969|| [NRW69]
 |-
-!CD 154|| Double Petticoat|| Telegraph & Telephone|| &nbsp;|| 1922|| 1967<|| Per N.R. Woodward on Hemingray|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |157.5|| &nbsp;|| Telegraph|| &nbsp;|| 1893|| 1894|| &nbsp;|| Unique to STANDARD (1893-1894)|| 1976|| [Mil76]
 |-
-!CD 154.3|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |158|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| [Mil76]
 |-
-!CD 154.5|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| DERFLINGHER or NO NAME - MEXICO|| 1969|| Originally CD 454.  The Glass Insulator in America 1969 Report
+| align="left" |158.1|| &nbsp;|| Telegraph|| &nbsp;|| 1871|| &nbsp;|| &nbsp;|| CHESTER (1871-1877) or NO EMBOSSING  Pat'd 1871|| 1988|| [NRW88]
 |-
-!CD 154.7|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |158.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING|| 1973|| [GIaCR]
 |-
-!CD 155|| &nbsp;|| Telegraph & Telephone|| &nbsp;|| 1938|| 1967<|| Per N.R. Woodward on Hemingray|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |158.9|| &nbsp;|| Telegraph|| Screw Top Boston|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1973|| [GIaCR]
 |-
-!CD 155.6|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |159|| &nbsp;|| Telegraph|| Gregory|| 1903|| &nbsp;|| &nbsp;|| Unique to GREGORY  Pat'd 1903|| 1976|| [Mil76]
 |-
-!CD 156|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |160|| Double Petticoat Pony|| Telephone|| Baby Signal|| 1889|| 1957~|| &nbsp; || &nbsp;|| 1967|| [NRW67]
 |-
-!CD 156.1|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |160.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 156.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| PATENT - OTHER or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide OR Woodward's 1988 Report
+| align="left" |160.6|| &nbsp;|| Telephone|| Pilgram Hat|| 1885>|| 1915<|| &nbsp;|| Unique to AM.TEL.& TEL.CO. (1885-1915)|| 1973|| [GIaCR].  Listed in Milholland's Bicentennial and 1979 Price Guide as CD 160.5.
 |-
-!CD 157|| &nbsp;|| Telegraph|| Teepee|| &nbsp;|| &nbsp;|| &nbsp;|| BROOKFIELD (1869-1921) or HEMINGRAY (1865-1970)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |160.7|| &nbsp;|| &nbsp;|| Ice Cream Cone or Snow Cone|| 1883|| 1886|| &nbsp;|| Unique to AM.INSULATOR CO. (1883-1886)|| 1971|| Originally CD 461.  Insulators With Embossing Errors
 |-
-!CD 157.5|| &nbsp;|| Telegraph|| &nbsp;|| 1893|| 1894|| &nbsp;|| Unique to STANDARD (1893-1894)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |161|| &nbsp;|| Secondary|| &nbsp;|| 1916<|| 1912>|| &nbsp;|| STAR ¥ or CALIFORNIA (1912-1916)|| 1969|| [NRW69]
 |-
-!CD 158|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |161.2|| &nbsp;|| Secondary|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| [Mil76]
 |-
-!CD 158.1|| &nbsp;|| Telegraph|| &nbsp;|| 1871|| &nbsp;|| &nbsp;|| CHESTER (1871-1877) or NO EMBOSSING  Pat'd 1871|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |162|| Deep Groove Double Petticoat|| Secondary|| Signal|| 1890~|| 1942|| <ref>CD 162 Per N.R. Woodward on Hemingray</ref>|| Started in the late 1880s|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |162.05|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 158.2|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| BOSTON BOTTLE WORKS (1871-1877) or NO EMBOSSING|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |162.1|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| STAR ¥ or BROOKFIELD (1869-1921)|| 1976|| [Mil76]
 |-
-!CD 158.9|| &nbsp;|| Telegraph|| Screw Top Boston|| 1871|| 1877|| &nbsp;|| Unique to BOSTON BOTTLE WORKS (1871-1877)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |162.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 159|| &nbsp;|| Telegraph|| Gregory|| 1903|| &nbsp;|| &nbsp;|| Unique to GREGORY  Pat'd 1903|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |162.3|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| STAR ¥ or BROOKFIELD (1869-1921)|| 1976|| [Mil76]
 |-
-!CD 160|| Double Petticoat Pony|| Telephone|| Baby Signal|| 1889|| 1967~|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |162.4|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING Canadians|| 1973|| [GIaCR]
 |-
-!CD 160.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |162.5|| P.R.R.|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| P.L.W. or P.R.R.|| 1969|| Originally CD 462.  [NRW69]
 |-
-!CD 160.6|| &nbsp;|| Telephone|| Pilgram Hat|| 1885>|| 1915<|| &nbsp;|| Unique to AM.TEL.& TEL.CO. (1885-1915)|| 1973|| The Glass Insulator  A Comprehensive Reference.  Listed in Milholland's Bicentennial and 1979 Price Guide as CD 160.5.
+| align="left" |162.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 160.7|| &nbsp;|| &nbsp;|| Ice Cream Cone or Snow Cone|| 1883|| 1886|| &nbsp;|| Unique to AM.INSULATOR CO. (1883-1886)|| 1971|| Originally CD 461.  Insulators With Embossing Errors
+| align="left" |162.7|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Various Mexican only|| 1976|| [Mil76]
 |-
-!CD 161|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| STAR ¥ or CALIFORNIA (1912-1916)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |163|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 161.2|| &nbsp;|| Secondary|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |163.2|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1988|| [NRW88]
 |-
-!CD 162|| Deep Groove Double Petticoat|| Secondary|| Signal|| 1890~|| 1942|| Per N.R. Woodward on Hemingray|| Started in the late 1880s|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |163.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)|| 1999|| [McDPG99]
 |-
-!CD 162.05|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
+| align="left" |164|| Extra Deep Groove DP|| Secondary|| &nbsp;|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 162.1|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| STAR ¥ or BROOKFIELD (1869-1921)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |164.4|| &nbsp;|| Secondary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1973|| [GIaCR]
 |-
-!CD 162.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
+| align="left" |165|| &nbsp;|| Secondary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 162.3|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| STAR ¥ or BROOKFIELD (1869-1921)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |165.1|| &nbsp;|| Secondary|| &nbsp;|| 1922>|| 1946<|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)|| 1973|| [GIaCR]
 |-
-!CD 162.4|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING Canadians|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |166|| &nbsp;|| Secondary|| &nbsp;|| 1912|| 1916|| &nbsp;|| Unique to CALIFORNIA (1912-1916)|| 1969|| [NRW69]
 |-
-!CD 162.5|| P.R.R.|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| P.L.W. or P.R.R.|| 1969|| Originally CD 462.  The Glass Insulator in America 1969 Report
+| align="left" |166.2|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| E.L.CO. (1890-1910) or NO EMBOSSING|| 1973|| [GIaCR]
 |-
-!CD 162.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
+| align="left" |167|| &nbsp;|| Secondary|| &nbsp;|| 1946|| &nbsp;|| <ref>CD 167 Per N.R. Woodward on Whitall Tatum</ref>|| ARMSTRONG Á (1946-1969) or NO NAME|| 1967|| [NRW67]
 |-
-!CD 162.7|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Various Mexican only|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |168|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 163|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |168.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1976|| [Mil76]
 |-
-!CD 163.2|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |168.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 163.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)|| 1999|| 1999 Price Guide
+| align="left" |169|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1969|| [NRW69]
 |-
-!CD 164|| Extra Deep Groove DP|| Secondary|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |169.5|| &nbsp;|| Telegraph|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| [Mil76]
 |-
-!CD 164.4|| &nbsp;|| Secondary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |170|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1969|| [NRW69]
 |-
-!CD 165|| &nbsp;|| Secondary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |170.1|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1973|| [GIaCR]
 |-
-!CD 165.1|| &nbsp;|| Secondary|| &nbsp;|| 1922>|| 1946<|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |170.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
+|- style="background:#E0E0E0;"
+| align="left" |171|| Telegraph or Heavy Telegraph|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |172|| Small Deep Groove Double Petticoat|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 166|| &nbsp;|| Secondary|| &nbsp;|| 1912|| 1916|| &nbsp;|| Unique to CALIFORNIA (1912-1916)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |173|| &nbsp;|| Secondary|| &nbsp;|| 1912<|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 166.2|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| E.L.CO. (1890-1910) or NO EMBOSSING|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |174|| Wide Groove DP|| Secondary|| &nbsp;|| 1912<|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 167|| &nbsp;|| Secondary|| &nbsp;|| 1946|| &nbsp;|| Per N.R. Woodward on Whitall Tatum|| ARMSTRONG Á (1946-1969) or NO NAME|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |174.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| &nbsp;||
 |-
-!CD 168|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |175|| &nbsp;|| Secondary|| Door Knob|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 168.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO NAME|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |175.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 168.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |176|| Carrier|| Telephone|| Mushroom|| 1929|| &nbsp;|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)  Pat'd 1929|| 1976|| [Mil76]
 |-
-!CD 169|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |176.9|| &nbsp;|| &nbsp;|| Toadstool|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to HEMINGRAY|| 2000||
+|- style="background:#E0E0E0;"
+| align="left" |177|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Previously foreign (VEGLA)|| &nbsp;|| No Known Examples
 |-
-!CD 169.5|| &nbsp;|| Telegraph|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |178|| Santa Ana|| 7 500v|| Santa Ana|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 170|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |178.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1915>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-).  Only embossing includes 1915 Patent date.|| 1995|| [McDPG95]
+|- style="background:#E0E0E0;"
+| align="left" |179|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Previously foreign (ESA ILNS  SEDIVER)|| &nbsp;|| No Known Examples
 |-
-!CD 170.1|| &nbsp;|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |180|| Liquid Insulator|| &nbsp;|| Liquid Insulator|| 1894<|| &nbsp;|| &nbsp;|| Unique to LIQUID INSULATOR  old style as of 1894 Pat|| 1976|| [Mil76]
 |-
-!CD 170.4|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
+| align="left" |180.1|| &nbsp;|| &nbsp;|| Fluid Insulator|| 1894<|| &nbsp;|| &nbsp;|| Unique to FLUID INSULATOR  old style as of 1894 Pat|| 1990|| [McD].  Now CD 180.5
 |-
-!CD 171|| Telegraph or Heavy Telegraph|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |180.5|| &nbsp;|| &nbsp;|| Fluid Insulator|| 1894<|| &nbsp;|| &nbsp;|| &nbsp;|| 1999|| [McDPG99]
 |-
-!CD 172|| Small Deep Groove Double Petticoat|| Secondary|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |181|| &nbsp;|| &nbsp;|| Pluto|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1973|| [GIaCR]
 |-
-!CD 173|| &nbsp;|| Secondary|| &nbsp;|| 1869>|| 1921<|| 1912< Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |181.5|| &nbsp;|| &nbsp;|| Spaceman|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1995|| [McDPG95]
 |-
-!CD 174|| Wide Groove DP|| Secondary|| &nbsp;|| 1869>|| 1921<|| 1912< Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |182|| Dry Spot|| Telegraph|| Dry Spot|| 1926|| 1926|| <ref>The Rainbow Riders' Trading Post, June 15, 1995.  Vol. 4, No. 6, p9.  "The Millville Report" by Richard Wentzel. "...figures A, B, and C verify production of 1,241 pieces during trial automated production from April 12 through April 17, plus 882 pieces produced on June 7, for a total of 2,133, plus an unspecified amount produced on April 6."</ref> || Unique to DRY SPOT INSULATOR  Whitall Tatum (1922-1946)  Pat'd 1929|| 1976|| [Mil76]
 |-
-!CD 174.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |183|| &nbsp;|| Primary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 175|| &nbsp;|| Secondary|| Door Knob|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |184|| &nbsp;|| &nbsp;|| Climax|| 1869>|| 1921<|| &nbsp;|| Unique to CLIMAX  Brookfield (1869-1921) dump item|| 1990|| [McD]
 |-
-!CD 175.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |185|| Mine Insulator|| &nbsp;|| Mine Insulator|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 176|| Carrier|| Telephone|| Mushroom|| 1929|| &nbsp;|| &nbsp;|| Unique to WHITALL TATUM ¸ (1922-1946)  Pat'd 1929|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |185.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to B.E.L.CO.|| 1976|| [Mil76]
 |-
-!CD 176.9|| &nbsp;|| &nbsp;|| Toadstool|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to HEMINGRAY|| 2000||
+| align="left" |186|| &nbsp;|| Spark Gap Insulator|| &nbsp;|| 1940|| 1940|| <ref name="CD186">CD 186, 186.1, and 186.2 are experimental Hemingray pieces made in 1940. The date code all three CDs insulators is "38:". CD 186 is shown in
+{{Patent
+| type = Utility
+| number = 2,392,342
+| patentee = Alwin G. Steinmayer
+| date = January 8, 1946
+}}
+See http://www.insulators.info/pictures/?id=120222643</ref>|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 177|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Previously foreign (VEGLA)|| &nbsp;|| Never Officially Assigned
+| align="left" |186.1|| &nbsp;|| Spark Gap Insulator|| &nbsp;|| 1940|| 1940|| <ref name="CD186" />|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 178|| Santa Ana|| 7 500v|| Santa Ana|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |186.2|| &nbsp;|| Spark Gap Insulator|| Nut|| 1940|| 1940|| <ref name="CD186" />|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 178.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1915>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-).  Only embossing includes 1915 Patent date.|| 1995|| 1995 Price Guide for Insulators
+| align="left" |187|| Brown Pony|| Telephone|| Duplex|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 179|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Previously foreign (ESA ILNS  SEDIVER)|| &nbsp;|| Never Officially Assigned
+| align="left" |188|| Brown Deep Groove|| &nbsp;|| Duplex|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |189|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 180|| Liquid Insulator|| &nbsp;|| Liquid Insulator|| 1894<|| &nbsp;|| &nbsp;|| Unique to LIQUID INSULATOR  old style as of 1894 Pat|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |190/191|| Hibbard Transposition|| Telephone|| Two Piece Tramp|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 180.1|| &nbsp;|| &nbsp;|| Fluid Insulator|| 1894<|| &nbsp;|| &nbsp;|| Unique to FLUID INSULATOR  old style as of 1894 Pat|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators.  Now CD 180.5
+| align="left" |192.1/193.1|| &nbsp;|| &nbsp;|| Two Piece Tramp|| 1886>|| &nbsp;|| &nbsp;|| AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING|| 1988|| [McD] 192.1 / [Mil76] 193.1
 |-
-!CD 180.5|| &nbsp;|| &nbsp;|| Fluid Insulator|| 1894<|| &nbsp;|| &nbsp;|| &nbsp;|| 1999|| McDougald's 1999 Price Guide
+| align="left" |192/193|| Hibbard Transposition|| Telephone|| Two Piece Tramp|| 1886>|| &nbsp;|| &nbsp;|| AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 181|| &nbsp;|| &nbsp;|| Pluto|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |194.5/195.5|| &nbsp;|| &nbsp;|| Two Piece Tramp|| 1930|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)  Pat'd 1930|| 1990|| [McD]
 |-
-!CD 181.5|| &nbsp;|| &nbsp;|| Spaceman|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1995|| 1995 Price Guide for Insulators
+| align="left" |194/195|| Transposition|| Telephone|| Two Piece Tramp|| 1886>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1969|| [NRW69]
 |-
-!CD 182|| Dry Spot|| Telegraph|| Dry Spot|| 1929|| 1946<|| &nbsp;|| Unique to DRY SPOT INSULATOR  Whitall Tatum (1922-1946)  Pat'd 1929|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |196|| Perfect Transposition|| Telephone|| Tramp|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 183|| &nbsp;|| Primary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |196.2|| &nbsp;|| &nbsp;|| Tramp|| 1883>|| 1910<|| <ref>CD 196.2 1893-1910 per Bob Stahr note</ref>|| Unique to H.G.CO.|| 1990|| [McD]
 |-
-!CD 184|| &nbsp;|| &nbsp;|| Climax|| 1869>|| 1921<|| &nbsp;|| Unique to CLIMAX  Brookfield (1869-1921) dump item|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |196.5|| &nbsp;|| &nbsp;|| Tramp|| 1883>|| 1910<|| <ref>CD 196.5 1893-1910 per Bob Stahr note</ref>|| Unique to H.G.CO.|| 1990|| [McD]
 |-
-!CD 185|| Mine Insulator|| &nbsp;|| Mine Insulator|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |197|| Transposition|| Telephone|| Tramp|| 1886>|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |198|| &nbsp;|| &nbsp;|| &nbsp;|| 1886>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 185.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to B.E.L.CO.|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |199|| Transposition|| Telephone|| Tramp|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1973|| [GIaCR]
 |-
-!CD 186|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |200|| Transposition|| Telephone|| Tramp|| 1900~|| 1915~|| <ref>CD 200 Insulator of the Week 27 Dec 2007.  http://www.insulators.info/wiki/IOTW_CD_200</ref>|| STAR ¥  CALIFORNIA (1912-1916) or NO NAME|| 1967|| [NRW67]
 |-
-!CD 186.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |201|| Transposition|| Telephone|| Tramp|| 1886>|| 1912>|| &nbsp;|| HEMINGRAY (1865-1970)  CALIFORNIA (1912-1916) or H.G.CO.|| 1967|| [NRW67]
 |-
-!CD 186.2|| &nbsp;|| &nbsp;|| Nut|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |202|| Transposition|| Telephone|| Tramp|| 1896|| 1912>|| <ref name="LockeBio">Gish, Elton (1994). Fred M. Locke  A Biography</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 187|| Brown Pony|| Telephone|| Duplex|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |203|| Transposition|| Telephone|| Tramp|| 1946|| &nbsp;|| <ref>CD 203 Per N.R. Woodward on Whitall Tatum</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 188|| Brown Deep Groove|| &nbsp;|| Duplex|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |203.2|| Transposition|| Telephone|| Tramp|| 1956|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)  Pat'd 1956|| 1976|| [Mil76]
 |-
-!CD 189|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |204|| Transposition|| Telephone|| Locke Crosstop or Tramp|| 1892|| 1895|| <ref name="LockeBio" />|| LOCKE (1892-) or NO EMBOSSING  Pat'd 1894.  NO EMBOSSINGs made first around 1892  only manufactured for a short while.|| 1973|| [GIaCR]
 |-
-!CD 190/191|| Hibbard Transposition|| Telephone|| Two Piece Tramp|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |205|| Transposition|| Telephone or Secondary|| Tramp|| 1886>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 192.1/193.1|| &nbsp;|| &nbsp;|| Two Piece Tramp|| &nbsp;|| &nbsp;|| &nbsp;|| AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING|| 1988|| Insulators  A History and Guide to North American Glass Pintype Insulators 192.1 / Millhollands Most About Glass Insulators Bicentennial Edition 193.1
+| align="left" |205.5|| Large Double Groove DP|| &nbsp;|| &nbsp;|| 1886>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1988|| [NRW88]
 |-
-!CD 192/193|| Hibbard Transposition|| Telephone|| Two Piece Tramp|| &nbsp;|| &nbsp;|| &nbsp;|| AM.TEL.& TEL.CO. (1885-1915) or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |206|| &nbsp;|| Telephone|| Castle|| 1935>|| 1940<|| <ref>CD 206 thought to have been made by both McLaughlin and Maydwell</ref>|| Unique to NO EMBOSSING|| 1969|| [NRW69]
 |-
-!CD 194.5/195.5|| &nbsp;|| &nbsp;|| Two Piece Tramp|| 1930|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)  Pat'd 1930|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |206.5|| &nbsp;|| Telephone|| Claw|| 1902|| 1906|| &nbsp;|| Unique to HARLOE » (1902-1906)|| 1979|| [MilSPG79]
 |-
-!CD 194/195|| Transposition|| Telephone|| Two Piece Tramp|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |207|| &nbsp;|| &nbsp;|| &nbsp;|| 1900|| 1921<|| &nbsp;|| Unique to B  Pat'd 1900|| 1973|| [GIaCR]
 |-
-!CD 196|| Perfect Transposition|| Telephone|| Tramp|| 1912<|| 1912>|| 1912< Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |207.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 196.2|| &nbsp;|| &nbsp;|| Tramp|| 1883>|| 1910<|| (1893-1910 per Bob Stahr note)|| Unique to H.G.CO.|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |208|| Top Groove Telephone|| Telephone|| Top Groove Hot Cross Bun|| 1890>|| 1912>|| &nbsp;|| Made by CALIFORNIA (1912-1916)|| 1967|| [NRW67]
 |-
-!CD 196.5|| &nbsp;|| &nbsp;|| Tramp|| 1883>|| 1910<|| (1893-1910 per Bob Stahr note)|| Unique to H.G.CO.|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |209|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp; || &nbsp;|| &nbsp;|| GIFONA - Chilean piece.
 |-
-!CD 197|| Transposition|| Telephone|| Tramp|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |210|| Standard Postal Telegraph|| Telegraph|| &nbsp;|| 1917|| &nbsp;|| &nbsp;|| POSTAL or NO EMBOSSING  Pat'd 1917|| 1967|| [NRW67]
 |-
-!CD 198|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |211|| No Leak|| Telegraph|| No Leak|| 1908|| 1921<|| <ref>CD 211 1909 - 12 or so per trade articles from Elton/Bob Stahr</ref>|| Unique to BROOKFIELD (1869-1921)  Pat'd 1908|| 1973|| [GIaCR]
+|- style="background:#E0E0E0;"
+| align="left" |212|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 199|| Transposition|| Telephone|| Tramp|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |213|| Top Groove Western Union|| Telegraph|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 200|| Transposition|| Telephone|| Tramp|| 1912<|| 1912>|| 1912< Brookfield 1912 Catalog|| STAR ¥  CALIFORNIA (1912-1916) or NO NAME|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |214|| &nbsp;|| Telegraph|| &nbsp;|| 1921> || &nbsp;|| <ref name="hemi1946" /> || &nbsp;|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |215|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 201|| Transposition|| Telephone|| Tramp|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970)  CALIFORNIA (1912-1916) or H.G.CO.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |216|| &nbsp;|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 202|| Transposition|| Telephone|| Tramp|| 1896|| 1912>|| Per Locke biography  1912< Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |217|| &nbsp;|| Primary|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1967|| [NRW67]
 |-
-!CD 203|| Transposition|| Telephone|| Tramp|| 1946|| &nbsp;|| Per N.R. Woodward on Whitall Tatum|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |218|| &nbsp;|| Primary|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 203.2|| Transposition|| Telephone|| Tramp|| 1956|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)  Pat'd 1956|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |219|| &nbsp;|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO EMBOSSING|| 1967|| [NRW67]
 |-
-!CD 204|| Transposition|| Telephone|| Locke Crosstop or Tramp|| 1892|| 1895|| Per Locke biography.|| LOCKE (1892-) or NO EMBOSSING  Pat'd 1894.  NO EMBOSSINGs made first around 1892  only manufactured for a short while.|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |220|| &nbsp;|| Primary|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 205|| Transposition|| Telephone or Secondary|| Tramp|| 1912<|| 1912>|| 1912< Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |220.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 205.5|| Large Double Groove DP|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |221|| &nbsp;|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |222|| Small Top Groove Double Petticoat|| 5 000v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |223|| High Voltage Double Petticoat|| 7 500v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |224|| High Voltage Double Petticoat|| 10 000v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 206|| &nbsp;|| Telephone|| Castle|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |225|| &nbsp;|| 5 000v|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 206.5|| &nbsp;|| Telephone|| Claw|| 1902|| 1906|| &nbsp;|| Unique to HARLOE » (1902-1906)|| 1979|| 1979 Milholland's Suggested Insulator Price Guide
+| align="left" |226|| &nbsp;|| 5 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| Unique to NO NAME|| 1967|| [NRW67]
 |-
-!CD 207|| &nbsp;|| &nbsp;|| &nbsp;|| 1900|| 1921<|| &nbsp;|| Unique to B  Pat'd 1900|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |226.3|| &nbsp;|| Primary|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to B|| 1988|| [NRW88]
+|- style="background:#E0E0E0;"
+| align="left" |227|| Large Groove Double Petticoat|| 5 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 207.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |228|| &nbsp;|| 10 000v|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 208|| Top Groove Telephone|| Telephone|| Top Groove Hot Cross Bun|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |228.5|| &nbsp;|| Primary|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1988|| [NRW88]
+|- style="background:#E0E0E0;"
+| align="left" |229|| Top Groove Double Petticoat|| 3 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 209|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| GIFONA -- Chilean piece.|| &nbsp;|| &nbsp;|| GIFONA
+| align="left" |229.6|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1988|| [NRW88]
 |-
-!CD 210|| Standard Postal Telegraph|| Telegraph|| &nbsp;|| 1917|| &nbsp;|| &nbsp;|| POSTAL or NO EMBOSSING  Pat'd 1917|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |230|| &nbsp;|| 6 600v|| Frog Eyes|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 211|| No Leak|| Telegraph|| No Leak|| 1908|| 1921<|| 1909 - 12 or so per trade articles from Elton/Bob Stahr|| Unique to BROOKFIELD (1869-1921)  Pat'd 1908|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |230.1|| &nbsp;|| 6 600v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 212|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |230.2|| &nbsp;|| 6 600v|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1976|| [Mil76]
 |-
-!CD 213|| Top Groove Western Union|| Telegraph|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |231|| &nbsp;|| Primary|| &nbsp;|| 1951|| &nbsp;|| <ref>CD 231 1951 start per N.R. Woodward</ref>|| KIMBLE (1952-1970) or HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 214|| &nbsp;|| Telegraph|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |231.2|| &nbsp;|| Primary|| &nbsp;|| 1952>|| 1970<|| &nbsp;|| Unique to KIMBLE (1952-1970)|| 1973|| [GIaCR]
 |-
-!CD 215|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |232|| &nbsp;|| 11 000v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 216|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |232.1|| &nbsp;|| 11 000v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1973|| [GIaCR]
 |-
-!CD 217|| &nbsp;|| Primary|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |232.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 218|| &nbsp;|| Primary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |233|| &nbsp;|| 6 600v|| &nbsp;|| 1926|| 1912>|| &nbsp;|| <ref name="McDs" />|| 1967|| [NRW67]
 |-
-!CD 219|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO EMBOSSING|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |233.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1990|| [McD]
 |-
-!CD 220|| &nbsp;|| Primary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |234|| &nbsp;|| 8 000v|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1967|| [NRW67]
 |-
-!CD 220.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
+| align="left" |234.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 221|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| WHITALL TATUM ¸ (1922-1946) or HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |235|| &nbsp;|| 8 000v|| &nbsp;|| 1926|| 1941<|| <ref name="McDs">McDougald, John & Carol (1990).  Insulators  A History and Guide to North American Pintype Insulators</ref>|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 222|| Small Top Groove Double Petticoat|| 5 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |236|| &nbsp;|| Primary|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| [Mil76]
 |-
-!CD 223|| High Voltage Double Petticoat|| 7 500v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |237|| &nbsp;|| 13 500v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 224|| High Voltage Double Petticoat|| 10 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |238|| &nbsp;|| Primary|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 225|| &nbsp;|| 5 000v|| &nbsp;|| 1869>|| 1921<|| 1912<  Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |238.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1995|| [McDPG95]
 |-
-!CD 226|| &nbsp;|| 5 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| Unique to NO NAME|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |238.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1990|| [McD]
 |-
-!CD 226.3|| &nbsp;|| Primary|| &nbsp;|| 1903>|| 1921<|| &nbsp;|| Unique to B|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |238.6|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 227|| Large Groove Double Petticoat|| 5 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |239|| &nbsp;|| Primary|| &nbsp;|| 1951|| &nbsp;|| <ref>CD 239 1951 start per N.R. Woodward</ref>|| KIMBLE (1952-1970) or HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 228|| &nbsp;|| 10 000v|| &nbsp;|| 1869>|| 1921<|| 1912<  Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |239.2|| &nbsp;|| Primary|| &nbsp;|| 1952>|| 1970<|| &nbsp;|| Unique to KIMBLE (1952-1970)|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 228.5|| &nbsp;|| Primary|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |240|| &nbsp;|| 13 500v|| &nbsp;|| 1927|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 229|| Top Groove Double Petticoat|| 3 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |240.2|| &nbsp;|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 229.6|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |240.5|| &nbsp;|| Primary|| &nbsp;|| 1926|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1976|| [Mil76]
 |-
-!CD 230|| &nbsp;|| 6 600v|| Frog Eyes|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |241|| &nbsp;|| 6 600v|| &nbsp;|| 1916~|| 1967<|| <ref name="LockeBio" />|| Unique to HEMINGRAY (1865-1970).|| 1967|| [NRW67]
 |-
-!CD 230.1|| &nbsp;|| 6 600v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |241.2|| &nbsp;|| 6 600v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 230.2|| &nbsp;|| 6 600v|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |242|| &nbsp;|| 10 000v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 231|| &nbsp;|| Primary|| &nbsp;|| 1951|| &nbsp;|| 1951 start per N.R. Woodward|| KIMBLE (1952-1970) or HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |243|| &nbsp;|| 15 000v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 231.2|| &nbsp;|| Primary|| &nbsp;|| 1952>|| 1970<|| &nbsp;|| Unique to KIMBLE (1952-1970)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |244|| &nbsp;|| &nbsp;|| Pomona or Crosstop|| 1892~|| 1895~|| &nbsp;|| Unique to NO EMBOSSING  Line construction use from ~1892 to 1895|| 1976|| [Mil76]
 |-
-!CD 232|| &nbsp;|| 11 000v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |244.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| Unique to GREELEY|| 1990|| [McD]
 |-
-!CD 232.1|| &nbsp;|| 11 000v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |245|| &nbsp;|| Primary|| &nbsp;|| 1890>|| 1892|| &nbsp;|| Unique to T-H. (1883-1892)|| 1973|| [GIaCR]
 |-
-!CD 232.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |245.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+|- style="background:#E0E0E0;"
+| align="left" |246|| High Voltage Double Petticoat|| 10 000v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 233|| &nbsp;|| 6 600v|| &nbsp;|| 1926|| &nbsp;|| 1912<  Brookfield 1912 Catalog|| Per McDougalds|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |247|| &nbsp;|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 233.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |247.3|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 234|| &nbsp;|| 8 000v|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |248/311/311|| Montana|| 15 000v|| Montana or Stacker|| 1890>|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or PYREX (1924-1941)|| 1967|| [NRW67]
 |-
-!CD 234.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |249|| Provo|| &nbsp;|| Provo|| 1902|| 1967<|| <ref>CD 249 Bob Stahr (7/7/9 note) agreement dated Aug 2 1902 with shipment due 60 days after</ref>|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76]
 |-
-!CD 235|| &nbsp;|| 8 000v|| &nbsp;|| 1926|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |250|| &nbsp;|| Cable|| &nbsp;|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1969|| [NRW69]
 |-
-!CD 236|| &nbsp;|| Primary|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |250.2|| &nbsp;|| Telephone|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| Unique to ERICSSON|| 1976|| [Mil76]
 |-
-!CD 237|| &nbsp;|| 13 500v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |251|| &nbsp;|| Cable|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 238|| &nbsp;|| Primary|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |252|| Knowles Cable|| Cable|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 238.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1995|| 1995 Price Guide for Insulators
+| align="left" |253|| Knowles Cable|| Cable|| &nbsp;|| 1900|| 1903|| &nbsp;|| Unique to KNOWLES (1900-1903)|| 1976|| [Mil76]
 |-
-!CD 238.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1946>|| 1969<|| &nbsp;|| Unique to ARMSTRONG Á (1946-1969)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |254|| Knowles Cable|| Cable|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |255|| &nbsp;|| Cable|| &nbsp;|| 1890>|| &nbsp;|| &nbsp; || &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 238.6|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |256|| Manhattan Cable|| Cable|| Manhattan|| 1890>|| &nbsp;|| &nbsp;|| Unique to MANHATTAN|| 1969|| [NRW69]
 |-
-!CD 239|| &nbsp;|| Primary|| &nbsp;|| 1951|| &nbsp;|| 1951 start per N.R. Woodward|| KIMBLE (1952-1970) or HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |257|| &nbsp;|| Cable|| Mickey Mouse|| 1890>|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or PATENT - OTHER|| 1967|| [NRW67]
 |-
-!CD 239.2|| &nbsp;|| Primary|| &nbsp;|| 1952>|| 1970<|| &nbsp;|| Unique to KIMBLE (1952-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |258|| &nbsp;|| Cable|| Roman Helmet|| 1890>|| &nbsp;|| &nbsp;|| Unique to CABLE|| 1976|| [Mil76]
 |-
-!CD 240|| &nbsp;|| 13 500v|| &nbsp;|| 1927|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |259|| &nbsp;|| Cable|| Roman Helmet|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 240.2|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| NO NAME or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |260|| &nbsp;|| Cable|| Roman Helmet|| 1890>|| 1912>|| &nbsp;|| Made by CALIFORNIA (1912-1916)|| 1969|| [NRW69]
+|- style="background:#E0E0E0;"
+| align="left" |261|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 240.5|| &nbsp;|| Primary|| &nbsp;|| 1926|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |262|| Columbia Single Petticoat|| Cable|| Baby Columbia|| 1890>|| 1912>|| &nbsp;|| Unique to COLUMBIA|| 1967|| [NRW67]
 |-
-!CD 241|| &nbsp;|| 6 600v|| &nbsp;|| 1916~|| 1967<|| Start date per Locke biography|| Unique to HEMINGRAY (1865-1970).|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |263|| Columbia|| Cable|| Columbia|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 241.2|| &nbsp;|| 6 600v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |264|| Columbia|| Cable|| Columbia|| 1890>|| &nbsp;|| &nbsp;|| Unique to COLUMBIA|| 1976|| [Mil76]
 |-
-!CD 242|| &nbsp;|| 10 000v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |265|| Fisher|| Third Rail|| Fisher|| 1883>|| 1888~|| &nbsp;|| FISHER or NO EMBOSSING  Electric railway developed mid 1880s in use 'till 1888|| 1973|| [GIaCR]
 |-
-!CD 243|| &nbsp;|| 15 000v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |265.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 244|| &nbsp;|| &nbsp;|| Pomona or Crosstop|| 1892~|| 1895~|| &nbsp;|| Unique to NO EMBOSSING  Line construction use from ~1892 to 1895|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |266|| Boston Cable|| Cable|| Boston Cable|| 1890>|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER (1890 Date)|| 1967|| [NRW67]
 |-
-!CD 244.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to GREELEY|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |267|| Boston Cable|| Cable|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 245|| &nbsp;|| Primary|| &nbsp;|| 1883|| 1892|| &nbsp;|| Unique to T-H. (1883-1892)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |267.5|| &nbsp;|| Cable|| Straight Sides|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1976|| [Mil76]
 |-
-!CD 245.2|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |268|| Crown|| Cable|| Crown|| 1895|| 1912>|| &nbsp;|| Unique to THE CROWN  Pat'd 1895|| 1967|| [NRW67]
 |-
-!CD 246|| High Voltage Double Petticoat|| 10 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |268.5|| &nbsp;|| Cable|| &nbsp;|| 1893|| 1894|| &nbsp;|| Unique to STANDARD (1893-1894)|| 1976|| [Mil76]
 |-
-!CD 247|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |269|| New Jumbo|| Cable|| Eared Jumbo|| 1890>|| 1912>|| &nbsp;|| OAKMAN MFG.CO. (1890-1897) or JUMBO|| 1967|| [NRW67]
 |-
-!CD 247.3|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |270|| &nbsp;|| Cable|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 248/311/311|| Montana|| 15 000v|| Montana or Stacker|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or PYREX (1924-1941)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |271|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 249|| Provo|| &nbsp;|| Provo|| 1902|| 1967<|| Bob Stahr (7/7/9 note) agreement dated Aug 2 1902 with shipment due 60 days after|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |272|| &nbsp;|| 6 600v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 250|| &nbsp;|| Cable|| &nbsp;|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |273|| &nbsp;|| 5 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| Unique to NO EMBOSSING|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |274|| High Voltage Double Petticoat|| 11 000v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 250.2|| &nbsp;|| Telephone|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to ERICSSON|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |275|| &nbsp;|| 10 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| LOCKE (1892-) or NO NAME|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |276|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |277|| Extra Large Top Groove Double Petticoat|| 6 600v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |278|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
+|- style="background:#E0E0E0;"
+| align="left" |279|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 251|| &nbsp;|| Cable|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |280|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 252|| Knowles Cable|| Cable|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |281|| &nbsp;|| 10 000v|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or LYNCHBURG ¨ (1923-1925)|| 1967|| [NRW67]
 |-
-!CD 253|| Knowles Cable|| Cable|| &nbsp;|| 1900|| 1903|| &nbsp;|| Unique to KNOWLES (1900-1903)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |282|| Provo|| 13 200v|| Provo|| 1897|| &nbsp;|| <ref>CD 282 Included in 1897 Electrical Appliance Catalog</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 254|| Knowles Cable|| Cable|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |283|| Provo|| 15 000v|| Provo|| 1897|| &nbsp;|| <ref>CD 283 Included in 1897 Electrical Appliance Catalog</ref>|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 255|| &nbsp;|| Cable|| &nbsp;|| &nbsp;|| &nbsp;|| Woodward's 1988|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |284|| Floy|| 11 000v|| &nbsp;|| 1912<|| 1912>|| &nbsp;|| Unique to FLOY|| 1967|| [NRW67]
 |-
-!CD 256|| Manhattan Cable|| Cable|| Manhattan|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to MANHATTAN|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |285|| 4-inch Edison|| &nbsp;|| Edison|| 1892|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING  Pat'd 1892|| 1967|| [NRW67]
 |-
-!CD 257|| &nbsp;|| Cable|| Mickey Mouse|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or PATENT - OTHER|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |286|| &nbsp;|| &nbsp;|| &nbsp;|| 1892>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1976|| [Mil76]
 |-
-!CD 258|| &nbsp;|| Cable|| Roman Helmet|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to CABLE|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |286.9|| &nbsp;|| &nbsp;|| &nbsp;|| 1886>|| 1898<|| &nbsp;|| Unique to WESTINGHOUSE (1886-1898)|| 1990|| [McD]
 |-
-!CD 259|| &nbsp;|| Cable|| Roman Helmet|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |287|| &nbsp;|| 10 000v|| &nbsp;|| 1895|| 1912>|| <ref name="LockeBio" />|| LOCKE (1892-) or NO NAME.  NO NAME manufactured by Brookfield.|| 1967|| [NRW67]
 |-
-!CD 260|| &nbsp;|| Cable|| Roman Helmet|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1969|| The Glass Insulator in America 1969 Report
+| align="left" |287.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1894|| 1895|| <ref name="LockeBio" />|| Unique to LOCKE (1892-).  Manufactured by Brookfield.|| 1976|| [Mil76]
 |-
-!CD 261|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |287.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1891|| 1894|| <ref name="LockeBio" />|| Unique to BROOKFIELD (1869-1921).|| 1973|| [GIaCR]
 |-
-!CD 262|| Columbia Single Petticoat|| Cable|| Baby Columbia|| 1912<|| 1912>|| Brookfield 1912 Catalog|| Unique to COLUMBIA|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |288|| Mershon|| 12 000v|| Mershon|| 1912<|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 263|| Columbia|| Cable|| Columbia|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |289|| &nbsp;|| 18 000v|| &nbsp;|| 1912<|| 1912>|| &nbsp;|| LOCKE (1892-) or NO EMBOSSING|| 1967|| [NRW67]
 |-
-!CD 264|| Columbia|| Cable|| Columbia|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to COLUMBIA|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |289.9|| &nbsp;|| &nbsp;|| &nbsp;|| 1889|| 1893|| <ref name="LockeBio" />|| Unique to PATENT - OTHER  Pat'd 1889.|| 1990|| [McD]
+|- style="background:#E0E0E0;"
+| align="left" |290|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 265|| Fisher|| Third Rail|| Fisher|| 1883>|| 1888~|| &nbsp;|| FISHER or NO EMBOSSING  Electric railway developed mid 1880s in use 'till 1888|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |291|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO NAME|| 1976|| [Mil76]
 |-
-!CD 265.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |292|| Lachine Triple Petticoat|| Primary|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 266|| Boston Cable|| Cable|| Boston Cable|| 1890>|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER (1890 Date)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |292.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1900|| 1903|| &nbsp;|| Unique to KNOWLES (1900-1903)|| 1976|| [Mil76]
 |-
-!CD 267|| Boston Cable|| Cable|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |293|| &nbsp;|| Primary|| &nbsp;|| 1897|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1976|| [Mil76]
 |-
-!CD 267.5|| &nbsp;|| Cable|| Straight Sides|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |293.1|| &nbsp;|| Primary|| &nbsp;|| 1892>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1988|| [NRW88]
 |-
-!CD 268|| Crown|| Cable|| Crown|| 1895|| 1912>|| Brookfield 1912 Catalog|| Unique to THE CROWN  Pat'd 1895|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |294|| &nbsp;|| &nbsp;|| &nbsp;|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1976|| [Mil76]
 |-
-!CD 268.5|| &nbsp;|| Cable|| &nbsp;|| 1893|| 1894|| &nbsp;|| Unique to STANDARD (1893-1894)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |295|| &nbsp;|| 10 000v|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 269|| New Jumbo|| Cable|| Eared Jumbo|| 1912<|| 1912>|| Brookfield 1912 Catalog|| OAKMAN MFG.CO. (1890-1897) or JUMBO|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |296|| &nbsp;|| 10 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 270|| &nbsp;|| Cable|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |297|| &nbsp;|| 15 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| &nbsp;|| 1967|| [NRW67]
 |-
-!CD 271|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |298|| &nbsp;|| &nbsp;|| Ballerina|| 1890>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 272|| &nbsp;|| 6 600v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |299|| &nbsp;|| 11 000v|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 273|| &nbsp;|| 5 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| Unique to NO EMBOSSING|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |299.1|| &nbsp;|| 10 000v|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1976|| [Mil76]
 |-
-!CD 274|| High Voltage Double Petticoat|| 11 000v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |299.2|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1976|| Originally CD 315.5?  [Mil76].  Not listed in 1979 Price Guide
 |-
-!CD 275|| &nbsp;|| 10 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| LOCKE (1892-) or NO NAME|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |299.7|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 276|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |300|| &nbsp;|| 20 000v|| &nbsp;|| 1890>|| 1912>|| &nbsp;|| LOCKE (1892-) or BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 277|| Extra Large Top Groove Double Petticoat|| 6 600v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |301|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 278|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |301.2|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1988|| [NRW88]
 |-
-!CD 279|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |301.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| [Mil76].  Not listed in Woodward's 1988 Report
 |-
-!CD 280|| &nbsp;|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |302|| 7-inch Muncie|| 15 000v|| Muncie|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 281|| &nbsp;|| 10 000v|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or LYNCHBURG ¨ (1923-1925)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |303.5|| &nbsp;|| &nbsp;|| Provo|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1990|| [McD]
 |-
-!CD 282|| Provo|| 13 200v|| Provo|| 1897|| &nbsp;|| Included in 1897 Electrical Appliance Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |303/310|| 9-inch Muncie|| 20 000|| Muncie|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 283|| Provo|| 15 000v|| Provo|| 1897|| &nbsp;|| Included in 1897 Electrical Appliance Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |304/310|| &nbsp;|| &nbsp;|| Coolie Hat|| 1890>|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO EMBOSSING|| 1976|| [Mil76].  Not listed in 1979 Price Guide
+|- style="background:#E0E0E0;"
+| align="left" |305|| Small Top Groove Triple Petticoat|| 7 500v|| &nbsp;|| 1890>|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 284|| Floy|| 11 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| Unique to FLOY|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |306|| &nbsp;|| &nbsp;|| &nbsp;|| 1923|| 1925|| &nbsp;|| Unique to LYNCHBURG ¨ (1923-1925)|| 1973|| [GIaCR]
 |-
-!CD 285|| 4-inch Edison|| &nbsp;|| Edison|| 1892|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING  Pat'd 1892|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |307|| &nbsp;|| 10 000v|| Viking Helmet|| 1890>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| [NRW67]
 |-
-!CD 286|| &nbsp;|| &nbsp;|| &nbsp;|| 1892>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |308|| Cable|| 6 600v|| Viking Helmet|| 1890>|| 1912>|| &nbsp;|| NO EMBOSSING or NO NAME|| 1967|| [NRW67]
 |-
-!CD 286.9|| &nbsp;|| &nbsp;|| &nbsp;|| 1886>|| 1898<|| &nbsp;|| Unique to WESTINGHOUSE (1886-1898)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |309|| &nbsp;|| &nbsp;|| Beal's|| 1899|| &nbsp;|| &nbsp;|| Unique to BEAL'S  Pat'd 1899|| 1990|| [McD]
 |-
-!CD 287|| &nbsp;|| 10 000v|| &nbsp;|| 1895|| 1912>|| Start date per Locke biography   Brookfield 1912 Catalog|| LOCKE (1892-) or NO NAME.  NO NAME manufactured by Brookfield.|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |309.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1886>|| 1898<|| &nbsp;|| Unique to WESTINGHOUSE (1886-1898)|| 1990|| [McD]
 |-
-!CD 287.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1894|| 1895|| Dates per Locke biography.|| Unique to LOCKE (1892-).  Manufactured by Brookfield.|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |310|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 287.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1891|| 1894|| Dates per Locke biography|| Unique to BROOKFIELD (1869-1921).|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |311|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
 |-
-!CD 288|| Mershon|| 12 000v|| Mershon|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |312|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| [McD].  Previously sleeve to CD 249  has been dropped in 2003 PG.
 |-
-!CD 289|| &nbsp;|| 18 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| LOCKE (1892-) or NO EMBOSSING|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |313|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| [McD]
 |-
-!CD 289.9|| &nbsp;|| &nbsp;|| &nbsp;|| 1889|| 1893|| Dates per Locke biography.|| Unique to PATENT - OTHER  Pat'd 1889.|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |313.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| [McD]
 |-
-!CD 290|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |314|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| [McD].  Previously sleeve to CD 317.7  has been dropped in 2003 PG.
 |-
-!CD 291|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO NAME|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |315|| Type HG|| &nbsp;|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1967|| [NRW67]
 |-
-!CD 292|| Lachine Triple Petticoat|| Primary|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |315.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 292.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1900|| 1903|| &nbsp;|| Unique to KNOWLES (1900-1903)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |316|| &nbsp;|| 7 500v|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 293|| &nbsp;|| Primary|| &nbsp;|| 1897|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |316.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| [MilSPG79].  Not in McDougald's
 |-
-!CD 293.1|| &nbsp;|| Primary|| &nbsp;|| 1892>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |317|| &nbsp;|| Lightning Rod|| Candlestick or Bell Chambers|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| [GIaCR]
 |-
-!CD 294|| &nbsp;|| &nbsp;|| &nbsp;|| 1899|| 1899|| &nbsp;|| Unique to N.E.G.M.CO. (1899)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |317.5|| &nbsp;|| Lightning Rod|| &nbsp;|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| [GIaCR]
 |-
-!CD 295|| &nbsp;|| 10 000v|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |317.7|| &nbsp;|| &nbsp;|| &nbsp;|| 1883>|| 1910<|| <ref>CD 317.7 1893-1910 per Bob Stahr note</ref>|| Unique to H.G.CO.|| 1990|| [McD]
 |-
-!CD 296|| &nbsp;|| 10 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |317.8/313/313/313.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1902|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER  Pat'd 1902|| 1990|| [McD]
 |-
-!CD 297|| &nbsp;|| 15 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| &nbsp;|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |317.9|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| [Mil76]
 |-
-!CD 298|| &nbsp;|| &nbsp;|| Ballerina|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |318|| Niagara High Potential|| 20 000v|| &nbsp;|| 1892>|| 1912>|| &nbsp;|| Unique to LOCKE (1892-)|| 1967|| [NRW67]
 |-
-!CD 299|| &nbsp;|| 11 000v|| &nbsp;|| 1869>|| 1921<|| 1912<  Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |319|| Special High Potential|| 21 000v|| &nbsp;|| 1892>|| 1912>|| &nbsp;|| Unique to LOCKE (1892-)|| 1967|| [NRW67]
 |-
-!CD 299.1|| &nbsp;|| 10 000v|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |320|| &nbsp;|| 17 000v|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1967|| [NRW67]
 |-
-!CD 299.2|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1976|| Originally CD 315.5?  Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |321|| &nbsp;|| &nbsp;|| Bat Ears|| 1902|| 1903|| &nbsp;|| PRISM ¬ (1902-1903) or PATENT - OTHER|| 1969|| [NRW69]
 |-
-!CD 299.7|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
+| align="left" |322|| &nbsp;|| 23 000v|| &nbsp;|| 1927|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 300|| &nbsp;|| 20 000v|| &nbsp;|| 1912<|| 1912>|| Brookfield 1912 Catalog|| LOCKE (1892-) or BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |323|| &nbsp;|| 30 000v|| &nbsp;|| 1926|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 301|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
+| align="left" |324|| &nbsp;|| 35 000v|| &nbsp;|| 1932|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 301.2|| &nbsp;|| Primary|| &nbsp;|| 1920|| 1930|| &nbsp;|| Unique to NO EMBOSSING (FRY 1920-1930)|| 1988|| The Glass Insulator in America  1988 Report
+| align="left" |325|| &nbsp;|| 40 000v|| &nbsp;|| 1926|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 301.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in Woodward's 1988 Report
+| align="left" |326|| &nbsp;|| 45 000v|| &nbsp;|| 1932|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 302|| 7-inch Muncie|| 15 000v|| Muncie|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |327|| &nbsp;|| 50 000v|| &nbsp;|| 1926|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 303.5|| &nbsp;|| &nbsp;|| Provo|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
+| align="left" |328|| &nbsp;|| 55 000v|| &nbsp;|| 1932|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 303/310|| 9-inch Muncie|| 20 000|| Muncie|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |328.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1995|| [McDPG95]
+|- style="background:#E0E0E0;"
+| align="left" |329|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 304/310|| &nbsp;|| &nbsp;|| Coolie Hat|| &nbsp;|| &nbsp;|| &nbsp;|| HEMINGRAY (1865-1970) or NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition.  Not listed in 1979 Price Guide
+| align="left" |330|| &nbsp;|| 66 000v|| &nbsp;|| 1932|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
 |-
-!CD 305|| Small Top Groove Triple Petticoat|| 7 500v|| &nbsp;|| &nbsp;|| &nbsp;|| Brookfield 1912 Catalog|| &nbsp;|| &nbsp;|| Never Officially Assigned
+| align="left" |331|| &nbsp;|| 70 000v|| &nbsp;|| 1930|| 1941<|| <ref name="McDs" />|| Unique to PYREX (1924-1941).|| 1967|| [NRW67]
+|- style="background:#E0E0E0;"
+| align="left" |332|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| No Known Examples
 |-
-!CD 306|| &nbsp;|| &nbsp;|| &nbsp;|| 1923|| 1925|| &nbsp;|| Unique to LYNCHBURG ¨ (1923-1925)|| 1973|| The Glass Insulator  A Comprehensive Reference
+| align="left" |333|| &nbsp;|| &nbsp;|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1973|| [GIaCR]
 |-
-!CD 307|| &nbsp;|| 10 000v|| Viking Helmet|| 1870>|| 1967<|| &nbsp;|| Unique to HEMINGRAY (1865-1970)|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |338|| &nbsp;|| 16 000v|| &nbsp;|| 1890>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| [NRW67]
 |-
-!CD 308|| Cable|| 6 600v|| Viking Helmet|| 1912<|| 1912>|| Brookfield 1912 Catalog|| NO EMBOSSING or NO NAME|| 1967|| The Glass Insulator in America 1967 Report
+| align="left" |342|| &nbsp;|| 25 000v|| &nbsp;|| 1903|| 1903|| <ref>CD 342s were made in a single production run in late 1903.  The very first CD 342 tops had no embossing and were likely prototypes made before the embossing was engraved.  Note that unembossed bases were produced May - December, 1900 for the M-2795 gutter tops.  CD 342s with unembossed bases are reconstructed from a CD 342 top and a M-2795 bottom.  Per correspondence with Mike Spadafora, 10/29/2010.</ref>|| Unique to LOCKE (1892-)|| 1967|| [NRW67]
-|-
-!CD 309|| &nbsp;|| &nbsp;|| Beal's|| 1899|| &nbsp;|| &nbsp;|| Unique to BEAL'S  Pat'd 1899|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 309.5|| &nbsp;|| &nbsp;|| &nbsp;|| 1886>|| 1898<|| &nbsp;|| Unique to WESTINGHOUSE (1886-1898)|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 310|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
-|-
-!CD 311|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;||
-|-
-!CD 312|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators.  Previously sleeve to CD 249  has been dropped in 2003 PG.
-|-
-!CD 313|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 313.1|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 314|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators.  Previously sleeve to CD 317.7  has been dropped in 2003 PG.
-|-
-!CD 315|| Type HG|| &nbsp;|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 315.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
-|-
-!CD 316|| &nbsp;|| 7 500v|| &nbsp;|| 1869>|| 1921<|| 1912<  Brookfield 1912 Catalog|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 316.5|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| 1979|| 1979 Milholland's Suggested Insulator Price Guide.  Not in McDougald's
-|-
-!CD 317|| &nbsp;|| Lightning Rod|| Candlestick or Bell Chambers|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| The Glass Insulator  A Comprehensive Reference
-|-
-!CD 317.5|| &nbsp;|| Lightning Rod|| &nbsp;|| 1877>|| &nbsp;|| &nbsp;|| Unique to CHAMBERS  Pat'd 1877|| 1973|| The Glass Insulator  A Comprehensive Reference
-|-
-!CD 317.7|| &nbsp;|| &nbsp;|| &nbsp;|| 1883>|| 1910<|| (1893-1910 per Bob Stahr note)|| Unique to H.G.CO.|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 317.8/313/313/313.1|| &nbsp;|| &nbsp;|| &nbsp;|| 1902|| &nbsp;|| &nbsp;|| Unique to PATENT - OTHER  Pat'd 1902|| 1990|| Insulators  A History and Guide to North American Glass Pintype Insulators
-|-
-!CD 317.9|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Unique to NO EMBOSSING|| 1976|| Millhollands Most About Glass Insulators Bicentennial Edition
-|-
-!CD 318|| Niagara High Potential|| 20 000v|| &nbsp;|| 1892>|| 1912>|| Brookfield 1912 Catalog|| Unique to LOCKE (1892-)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 319|| Special High Potential|| 21 000v|| &nbsp;|| 1892>|| 1912>|| Brookfield 1912 Catalog|| Unique to LOCKE (1892-)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 320|| &nbsp;|| 17 000v|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 321|| &nbsp;|| &nbsp;|| Bat Ears|| 1902|| 1903|| &nbsp;|| PRISM ¬ (1902-1903) or PATENT - OTHER|| 1969|| The Glass Insulator in America 1969 Report
-|-
-!CD 322|| &nbsp;|| 23 000v|| &nbsp;|| 1927|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 323|| &nbsp;|| 30 000v|| &nbsp;|| 1926|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 324|| &nbsp;|| 35 000v|| &nbsp;|| 1932|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 325|| &nbsp;|| 40 000v|| &nbsp;|| 1926|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 326|| &nbsp;|| 45 000v|| &nbsp;|| 1932|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 327|| &nbsp;|| 50 000v|| &nbsp;|| 1926|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 328|| &nbsp;|| 55 000v|| &nbsp;|| 1932|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 328.2|| &nbsp;|| &nbsp;|| &nbsp;|| 1924>|| 1941<|| &nbsp;|| Unique to PYREX (1924-1941)|| 1995|| 1995 Price Guide for Insulators
-|-
-!CD 329|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
-|-
-!CD 330|| &nbsp;|| 66 000v|| &nbsp;|| 1932|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 331|| &nbsp;|| 70 000v|| &nbsp;|| 1930|| 1941<|| Start date per McDougalds.|| Unique to PYREX (1924-1941).|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 332|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| &nbsp;|| Never Officially Assigned
-|-
-!CD 333|| &nbsp;|| &nbsp;|| &nbsp;|| 1902|| 1903|| &nbsp;|| Unique to PRISM ¬ (1902-1903)|| 1973|| The Glass Insulator  A Comprehensive Reference
-|-
-!CD 338|| &nbsp;|| 16 000v|| &nbsp;|| 1869>|| 1921<|| &nbsp;|| Unique to BROOKFIELD (1869-1921)|| 1967|| The Glass Insulator in America 1967 Report
-|-
-!CD 342|| &nbsp;|| 25 000v|| &nbsp;|| 1892>|| &nbsp;|| &nbsp;|| Unique to LOCKE (1892-)|| 1967|| The Glass Insulator in America 1967 Report
 |}
+==References==
+* [GIaCR]  Cranfill, Gary & Kareofelas, Greg (1973).  The Glass Insulator  A Comprehensive Reference.
+* [MilSPG79] Keating, Paul (1979). Milholland's Suggested Insulator Price Guide.
+* [McD] McDougald, John & Carol (1990).  Insulators  A History and Guide to North American Glass Pintype Insulators.
+* [McDPG95] McDougald, John & Carol (1995).  Price Guide to North American Pintype Insulators.
+* [McDPG99] McDougald, John & Carol (1999).  Price Guide to North American Pintype Insulators.
+* [McDPG03] McDougald, John & Carol (2003).  Price Guide to North American Pintype Insulators.
+* [Mil72] Milholland, Marion (1972).  Most About Glass Insulators Revised.
+* [Mil76] Milholland, Marion (1976).  Most About Glass Insulators Bicentennial Edition.
+* [NRW67] Woodward, N.R. (1967).  The Glass Insulator in America  1967 Report.
+* [NRW69] Woodward, N.R. (1969).  The Glass Insulator in America  1969 Report.
+* [NRW88] Woodward, N.R. (1988).  The Glass Insulator in America  1988 Report.
+==General Dating Rules==
+* 1886> typically indicates a start date based on the origin of transposition theory
+* 1890> typically indicates a start date based on the saddle groove patent
+* 1912> or 1912< typically indicates the CD appeared in the Brookfield 1912 Catalog
+==Notes==
+<references />
+[[Category: CD Numbers]]