Original electrical trade vintage catalog for ASSOCIATED RESEARCH, INC. was located on Jackson at Green Streets, Chicago, IL. Manufacturers of Vibrotest, Vibroground, Hypot, Volt-ammeter, and Hand Tachometer testing equipment shown. Model 201, 255, 406, 404, 601 and 21. Disbound from a large 1948 architect construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electrical equipment library.