Original electrical trade vintage catalog for P. R. MALLORY & COMPANY, INC. was located in Indianapolis, IN. Manufacturers of rectifier, capacitor, rotary circuit selector switches and variable television and radio controls. Leading producer of special alloys and materials from copper, silver, platinum, palladium, tungsten, molybdenum and many other non-ferrous elements for unusual applications. Disbound from a large 1949 electrical construction materials book, this unique old four page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Pages are detached and contains a small amount of residual glue on edge.