Original glass trade vintage catalog for BLUE RIDGE GLASS CORPORATION, was located in Kingsport, TN. Manufacturers of Optex Glass Blackboards. Distributed by Libbey-Owens-Ford Glass Company. Used in schools, offices and industrial plants. Disbound from a large 1938 industrial glass catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro glass library.