Original electrical trade vintage catalog for McGILL MANUFACTURING COMPANY, INC. of Valparaiso, IN. Manufacturers of pulls, switches, sockets, guards and lamp changers. Every unit is the result of expert workmanship, backed by sound engineering principles and years of scientific research under actual operating conditions. Disbound from a large 1943 electrical construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A wonderful addition to your retro electric equipment library.