
Crawford E. Staples, Signal & Communications Division, Westinghouse Air Brake Company was an author of signaling guides for modellers, together with signal parts and kits.
 
Model Railroad Signaling and Control Manual by Crawford E Staples, 23 numbered pages, published 1939  | 
 
Model Railroad Signaling and Control Manual by Crawford E Staples, 23 numbered pages, published 1939  | 
 
Model Railroad Signaling and Control Manual by Crawford E Staples, 23 numbered pages, published 1939  | 
 
Model Railroad Signaling and Control Manual by Crawford E Staples, 23 numbered pages, published 1939  | 
 
Model Railroad Signaling and Control Manual by Crawford E Staples, 23 numbered pages, published 1939  | 
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