| Here is the 22nd of 36 plates constituting the "Centennial Album of Pennsylvania R.R. Photos and Prints." It was published in the April 1946 issue of "Railroad" magazine, page 31. Photo Caption: "Position Light Signals. First 'position light' signal? So it would seem from the 1864 date on this posted instruction sheet. Today, PRR uses more position light signals than any other railroad." |
| Date:
4/13/1946 |
Location:
Philadelphia, PA |
Views:
144 |
Collection Of:
 
Thomas C. Ayers |
|
Author: Thomas C. Ayers
|
 |
| Picture Categories: Signal |
This picture is part of album: PRR: "Railroad" Centennial Album ~ April 1946 |