Original electrical trade vintage catalog for STRUTHERS DUNN, INC. was located at 1329 Cherry Street, Philadelphia, PA. Manufacturers of electrical control devices, relay and timer, include standard, midget type, ratchet sequence relays, TD130 motor driven, thermal time delay and more. Disbound from a large 1942 electrical construction materials book, this unique old two page gatefold technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Pages are detached and contains a small amount of residual glue on edge.