Original industrial electrical trade vintage catalog for THE SPENCER THERMOSTAT COMPANY.  Main office and plant was located at 50 Forest Street, Attleboro, MA. 

Manufacturers of Motor Protectors, Temperature Controls for Built-in Applications. Products include Klixon Snap-Acting Controls, Circuit Breakers and Protectors for the Aircraft, Automotive, Mobile and other equipment. Has numerous product images with detailed descriptions, uses, applications, specifications and dimensions provided. Unbound from a large 1946 postwar industrial product designer catalog, this unique old four page technical brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your vintage industrial electrical equipment library.