Interesting article on Canadian Pacific RR watches.
http://people.timezone.com/msandler/Articles/ClitheroeRailroad/Railroad.html
The first watch developed specifically for the railroad trade was the Elgin "B. W. Raymond, which in the 1867 model was 15 jewel and key wound.
The last list was made in 1957, and included models of Zenith, Brandt (Omega) and Longines.