With all the interesting discussion on the CD 133.2 P&W embossing, I thought it would be interesting to post on the P&W I have in my collection. In my youth, I would hunt waterfowl on the public land surrounding the "Middle Creek Waterfowl Management Area" in central Pennsylvania. On my way home, I would always stop at Litiz, PA for some bbq chicken and to look for insulators at the weekend pop-up flea market. I've purchase a few good insulators from various vendors at these markets - one was a very nice CD 133.2 P&W. This insulator is embossed as follows:

CD-133.2 L.A.C. / Patd July 25th 1865 /P&W - Button MLOD [id=607605994] - Crude Rich Blue Measuerments are: 105 mm (Height) x 74 mm (Wide)

When I purchase an insulator, I always ask the seller about the insulators history. The vendor, who sold me this CD 133.2, indicated that her son worked for the Pennsylvania Railroad and hunts insulators on the railroad west of Carlisle, PA in Cumberland Co. for her to sell. I also asked, if she could tell me, what the P&W stood for. She said her son referred to it as Pennsylvania and Western Railway.

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.