CD Manufacturing Dates

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Revision as of 13:56, 12 October 2009; view current revision
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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 Name, Application, and Nickname are mostly from N.R. Woodward's "The Glass Insulator in America" Reports. The Start Date and End Date have three notations -- ">" and "<" which indicate that the date was, respectively, after or before the year given (inclusively), and "~" which indicates approximately. The References state where this information came from, and Comments provides some additional information to help in the dating. The Assigned Date and Comments show when the CD was originally assigned (again, note that this is approximate).

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

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CD Manufacturing Dates

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