Original electrical trade vintage catalog for ROLLER-SMITH COMPANY, of Bethlehem, PA. Manufacturers of air and oil circuit breakers, switchgear. Measuring and protective apparatus. Disbound from a large 1942 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.