Well this is interesting!
Posted: Mon Jun 06, 2016 1:19 pm
IIRC, this was the signal NS used to test various LEDs to see which one they liked the best. There were either 5 or 10 different models of LED on that signal. Underneath each one, there appears to be a label telling what model it is as well.cabman701 wrote:http://www.railpictures.net/photo/578718/