Original electrical trade vintage catalog for JOHN E. FAST & COMPANY, was located at 3123 North Crawford Avenue, Chicago, IL. Manufacturers of Capacitors. Rack type units, fast pole capacitors, dust tight and special capacitors for every industrial need. Higher power is a good answer to problems of overloaded feeders, low voltage levels and high line losses. Used in filters, welding equipment, control apparatus, X-ray equipment, railway signal work, for the exacting demands for the Army and Navy and in numerous other applications. Disbound from a large 1942 electrical construction materials book, this unique old two page gatefold 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.