Original electrical trade vintage catalog for DAHLSTROM METALLIC DOOR COMPANY, Office and factory was in Jamestown, NY. Manufacturers of Dahlstrom Conduo Base, a combination base and wire raceway for the distribution of telephone, signal and light wires. Electrical conduit. Types are Junior, Senior, and Bank Counter Top. Disbound from a large 1938 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.