Original electrical trade vintage catalog for SIGNAL ENGINEERING & MANUFACTURING COMPANY, was located at 150 West 14th Street, New York City, NY. Manufacturers of Wheelock Standards, Fire Alarm Systems, March Time, Master Code, General Alarm, NonCode Break Glass Station, Pull Lever Coded Stations, Fire Alarm Equipment, Bells, Special Signals, Type C9 and S9 Relays and more. Disbound from a large 1938 electrical construction materials book, this unique old sixteen page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Nice cover graphics. Pages are loose and contains a small amount of residual glue on edge.