Original electrical trade vintage catalog for THE R. THOMAS & SONS COMPANY, was located in East Liverpool, OH. Manufacturers of Porcelain insulators of high voltage, pin type, post and pillar, suspension and strain clamps, tubes, line wire protectors. Disbound from a large 1916 electrical construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Contains a small amount of residual glue on edge.