Original electrical trade vintage catalog for STRUTHERS-DUNN, INC. was located at 1321 Arch Street, Philadelphia, PA. Manufacturers of electrical control devices, including standard, midget and memory relays, mercury swing type, solenoids, timers, thermal delay relays and close differentials. Disbound from a large 1944 electrical construction materials book, this unique old two page 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.