Original heating trade vintage catalog for STERLING ENGINEERING COMPANY. Main office and factory was located at 3728 North Holton Street, Milwaukee, WI. Manufacturers of Steam and Water Heating Equipment. Vacuum vapor heating specialties, pumps, temperature controls and hot water specialties. Disbound from a large 1938 industrial heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library.