Original industrial trade vintage catalog for THE AUDIFFREN REFRIGERATING MACHINE COMPANY. Main office was located at 504 Murray Hill Building, New York City, NY. Manufacturers of Drinking Water Systems, Plants, Air Cooling Units, Airectifier for Air Conditioning. Used in fine residences, hospitals, cafeterias and laboratories. Disbound from a large 1931 industrial catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Slight damp stain on outer edge.