I finally found the box that my green CD 133.2 P&W was stored in. I found this insulator in 1977 on the Pennsylvania Railroad which is now CONRAIL railroad - probably Pennsylvania Western at the time this insulator was installed. This CD 133.2 was found west of Gallitzin on route to Creston, PA within a mile of where RT 53 was crossed by the RR track in Cambria Co., PA. The exact embossing and details are as follows:

CD-133.2 L.A.C. / Patd July 25th 1865 /P&W - Button MLOD - Crude Medium Green - Measuerments are: 95mm (Height) x 74 mm (Wide)

I was able to find a early 1884 Library of Congress map [id=607606483] that called the original Pennsylvania Railway the "Seaboard Pennsylvania and Western Railway". I know that the Pennsylvania Railroad is a crossroad hub of a national network which goes primarily westward to the midwest (Chicago). Many P&W insulators has been found in Ohio and even in Wisconsin.

Note: I will post a picture which compares the medium green CD 133.2 P&W with the blue aqua CD 133.2 P&W which is the more common color [id=608936137].