Original electrical trade vintage catalog for CERTIFIED BALLAST. MANUFACTURERS ASSOCIATION, INC. Main office and factory was located at 2116 Keith Building, Cleveland, OH. Manufacturers of Fluorescent lighting equipment, ballast, starters and tubes. 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.