The Uniform Code of Operating Rules, November 1, 1940, was/is a hardback grey clothbound rule book, issued by MP, RI and StLSW. I looked through my book at a few of the indications shown on the poster, and everything matches the rulebook, numbers, etc. So… yes, a reproduction, but it seems to be nicely done and a good summary of signal indications used at that time. The price is reasonable for what it is, though by the time you figure in the shipping, you could probably have purchased the original rulebook for less. Unlike earlier rulebooks, most of which had color printing for the various signal aspects, the 1940 issue was printed on the cheap, with only the letter of the color shown, rather than actual red-yellow-green indications, so in that regard, this poster is an improvement on the original. Also, the actual rulebook has exceptions for some lower quadrant indications used only by Rock Island, and this summary poster also includes those details. So… if you are called to pilot a MoP detour over the RI through Bauxite, Arkansas, you aren’t going to misinterpret that lower quadrant train order signal in front of the Bauxite depot. (If you get that call, however, let me know…)

Bill Pollard