Original industrial trade vintage catalog for AMERICAN AIR FILTER COMPANY, INC. was located at 226 Central Avenue, Louisville, KY. Manufacturers of Phoenix, Self-Cleaning, Multi-Panel, Horizontal, Standard Unit, Airmat Filters. For the removal of dust, dirt, bacteria and other foreign matters from the air. This equipment was used for general ventilation, drying operations, process dust control, air compressor and diesel engine, mill motor and turbo generator. Disbound from a large 1931 industrial catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Slight damp stain on outer edge.