Original glass trade vintage catalog for KOPP GLASS, INC. of Swissvale, PA. Manufacturers of Gothic, Modernistic Lighting Units. Daylight Cased, Conventional Designs Lighting Units, Crystal and Colored Glass, Nicco Opal Heat Resisting Glass light fixtures. Disbound from a large 1938 electrical construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro lighting equipment library.