Original industrial trade vintage catalog for NATIONAL PIPE BENDING COMPANY. Main office and factory was located at 131 River Street, New Haven, CT. Manufacturers of Feed Water Heaters, Oil Separators, Coilers of Pipe and Tubing. Facilities for Coils and bends. 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 heater equipment library. Slight damp stain on outer edge.