Original electrical trade vintage catalog for SPEER CARBON COMPANY, was located at Lincoln Avenue, St. Marys, PA. Manufacturers of Motor and generator bushes, welding electrodes and plates, carbon contacts, radio tube anodes, rheostat discs and plates. Speer has many grades of carbon and graphite and can fabricated them into a wide variety of parts with properties specifically suited to electrical equipment. Disbound from a large 1948 electrical construction materials book, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial electric equipment library.