In many cases the original Jefferson mile points can still be seen on the remaining posts. I can't post a picture of one but the original mile points were filled in and then painted over with the Penn Division numbers. As an example The post "A-150" was "13" but that number was filled in and painted over. The numbers for the Erie decreased as you head towards Jefferson Junction.
In all the posts I found along the Penn Division, both sides were painted with the "A" (Albany) designations, never saw a "W" on one side of the post. I have found the following posts.
146*,148*,150,153,157,158,160*,13,164,167*,173*,174,182 *=post was toppled over and unreadable.