Original 1946 heating trade vintage catalog for the MERCOID CORPORATION.  Main office and plant were located at 4213 Belmont Avenue, Chicago, IL.

Manufacturers of Automatic Controls for Heating, Air Conditioning, Refrigeration & Various Industrial Applications Equipped with Hermetically Sealed Mercury Switches.

Has numerous product images, description, application and specifications to provide product details. Unbound from a large rare 1946 Architectural Catalog, this unique old four-page technical brochure would display beautifully matted and framed. Awesome cover graphics. A fabulous addition to your retro heating industry library.