Okay please don't run away screaming in horror, this isn't another what color should I paint my Durasig thread. I saw this http://photoswest.org/cgi-bin/imager?00186235+Rh-1235in the library of congress. Many of us have seen it before. I assume that the signal in the photo is a gloss black and that made me think of Henry Ford saying about the color of his early cars "you can have any color you want, as long as it's black!" I was wondering if this applied to early signals as well. If that is the case, then when did the use of color paint on signals come into play and what eventually made it settle on yellow and dark green shades?
(and what color should I paint my Durasig)
3lg