n.p. (Denver and Salt Lake Railway), ca. 1929; 1938. Hardcover. Very good. Item #21685 .
Two volumes, both bound in textured cloth and embossed in blind with the title The 1929 edition is numbered No. 271 and was signed out to "H. N. Ralston, Bman". The 1938 volume is No. 608, and there is no signature in the sign out register.
The 1929 edition contains diagrams of conductors explaining various movements, as well as equipment lights, which are printed in the appropriate colors of red, green or yellow. The 1938 edition contains diagrams of signal lights, also printed in their appropriate colors.
Light wear and soil, else very good.