Original industrial trade vintage catalog for COEN COMPANY, INC. was located at 428 Story Building, Los Angeles, CA. Combustion Engineers. Manufacturers of Burners for Oil, Gas or Powdered Fuel, Cylindrical and Square Registers, Strainers and Oil Heaters. Venturi Type, Tri-Fuel. Disbound from a large 1931 industrial catalog, this unique old two page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Slight damp stain on outer edge.