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MECHANICAL CATALOGUE VOLUME 2; THE UNION SWITCH & SIGNAL CO.
Swissvale, PA: Union Switch & Signal Co., 1911. Hardcover. Very good plus. 483 pages divided with tabs by type of equipment; such as, Deflecting Bars; Cranks and Radial Arms; Wire Carrier and Stakes; Layout Switches, Frogs, Derail; Switch and Lock M…
