Original electrical trade vintage catalog for SANGAMO ELECTRIC COMPANY, of Springfield, IL. Manufacturers of KA, KAZ, VSW time switches, synchronous motor and silver contacts. The astronomic dial time-switch functions to close the circuit at sunset and open it at sunrise. Disbound from a large 1943 electrical construction materials book, this unique old two 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.