Original heating trade vintage catalog for GWYNN GAS BURNER & ENGINEERING COMPANY. Main office was located at 713-714 Empire Building, Pittsburgh, PA. Manufacturers of burners for furnaces and boilers. Used for high pressure, heating, melting, ovens, kilns. Disbound from a large 1916 industrial heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Page is detached and may contain a small amount of residual glue on edge.