Original electrical trade vintage catalog for STRUTHERS DUNN, INC. was located at 147 North Juniper Street, Philadelphia, PA. Manufacturers of Electrical Control Devices, Relay, Timer, Thermostat and Fish Spine Bead Insulation. Disbound from a large 1936 electrical construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library.