Discussion relating to the B&O up to it's 1972 merger into Chessie System. Visit the B&O Railroad Historical Society for more information. Also discussion of the C&O up to 1972. Visit the C&O Historical Society for more information. Also includes the WM up to 1972. Visit the WM Historical Society for more information.
  by lvrr325
 
Got no info with this other than "maybe" B&O. I can't find much online. It's large, at least 24" square, looks like bottom and upper left display red only. Case is aluminum.
You do not have the required permissions to view the files attached to this post.
  by lvrr325
 
Have determined this is a US&S signal similar to those installed by Conrail on former PRR (and likely other) lines in the 1980s.