I got this off eBay, showed up today. Only sixteen bucks, shipped, and in very good condition. I always wanted the manual for an ALCO R-S3.
The ET&WNC had two RS-3, traded for their former SRR 2-8-0s in 1967 (which eventually went to the Southern steam program as 630 and 722). I saw these RS-3s in a scrap line at Elizabethton TN in the early 80s. One got preserved, at TVRM in Chattanooga, and will eventually get restored as the Central of Georgia unit it originally was.
I never got to see their RS-3s in service that I can recall, but as a kid we'd go through the area on family vacations to visit relatives so maybe I did see them and just didn't know an ALCO product when I saw one (as I'd have been a little kid at the time).
Though I'm not into 3-rail (or even standard gauge in O), I'm seriously considering getting a O scale RS-3 if I can find an inexpensive one and making it into ET&WNC 210, the one that still exists today, and this manual will be part of that eventually: