Original electrical trade vintage catalog for THE AUTH ELECTRICAL SPECIALTY COMPANY. Main office and factory was located at 422-430 East 53rd Street, New York City, NY. Manufacturers of best grade bells and buzzers, heavy duty push buttons, intercommunicating telephones, hospital signaling systems, nurses call system, annunciators and marine signaling equipment for US Naval vessels. Disbound from a large 1943 architect construction materials book, this unique old two page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electrical equipment library. Contains a small amount of residual glue on edge.