Original heating trade vintage catalog for DAVIS ENGINEERING CORPORATION, Main office was located at 90 West Street, New York City, NY. Manufacturers of Paracoil Water Heaters, Evaporators and Other specialties. Storage, Instantaneous, Feed, Exhaust Gas-Steam Generators, Lubricating Oil Coolers. 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 heating equipment library. Slight damp stain on outer edge.