Original electrical trade vintage catalog for WESTON ELECTRICAL INSTRUMENT CORPORATION, was located at 639 Frelinghuysen Avenue, Newark, NJ. Manufacturers of portable test equipment and instruments. Switchboard and panel, sensitive relays, circuit tester, illumination meters and industrial analyzer are listed. Disbound from a large 1949 electrical materials book, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro electric test equipment library.