Ball-Hamilton 18-size, 21-Jewel, Order of Railway Conductors
by Lindell V. Riddle
(Northeastern Ohio in the USA)
Here is an image showing the color signature dial.
I am an avid collector of Railroad Grade Pocket Watches. The ones with "Brotherhood" markings such as Brotherhood of Railway Trainmen, Brotherhood of Locomotive Engineers and such are of special interest to me. You can see more of these and other interesting watches in our Research Forums and the Photo Gallery at nawcc-ihc.org on the Internet.