Original electrical trade vintage catalog for ASSOCIATED RESEARCH, INC. was located on Jackson at Green Streets, Chicago, IL. Manufacturers of Vibrotest, Vibroground, Hypot and Voltammeter. Model 201, Model 218 the Navy type, and model 221 the Marine kit are also shown. Testing Meters. Disbound from a large 1944 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.