Original electrical trade vintage catalog for RADIO CORPORATION OF AMERICA, was located in Camden, NJ. RCA Manufacturers of Industrial sound systems, music service, radio frequency electronic heating equipment. Pictured are microphones and stands, amplifiers, speakers and speaker mechanisms, Telekoms inter-office communication systems, music broadcasting unit and Type 15-B power generating equipment. Disbound from a large 1944 electrical construction materials book, this unique old eight page technical 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.