I was able to find a early 1884 Library of Congress map that called the original Pennsylvania Railway the "Seaboard Pennsylvania and Western Railroad". My speculation is that later folks referred to this railway as the Pennsylvania and Western before it was just call the "Pennsylvania Railroad". I know that the Pennsylvania Railroad is a crossroad hub of a national network which goes primarily westward to the mid-west (Chicago). Many CD 133.2 P&W insulators has been found in Ohio and even in Wisconsin. I wish more people would list more information about the history of where their insulators were found. It would be nice to know how far west the CD 133.2 P&W insulator can be found.

Again, this map can be viewed better if it's downloaded and expanded.