Original electrical trade vintage catalog for JEFFRIES TRANSFORMER COMPANY. Main office and factory was located at 1710 East 57th Street, Los Angeles, CA. Manufacturers of general purpose single and three phase, auto transformers, listed on spec charts. Type E, EA, ET and 60 cycles. Disbound from a large 1944 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.