Elements of Railway Signaling; Pamphlet 1979. June 1979
Rochester, NY: General Signal Corporation, 1979. 1st. Hardcover. Contains a brief illustrated history of railway signaling as an introduction to the subject. Many circuit diagrams and photos of signal operating systems including actuators and principles of operation. Bound in publisher's original black cloth with spine and cover stamped in gilt. 11 1/4 x 8 9/16 inches. Fine. Item #9028974
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