Original heating trade vintage catalog for JOHNSON FAN & BLOWER COMPANY, home office and factory was located at 1323 West Lake Street, Chicago, IL. Manufacturers of Propeller Fans, Volume Blowers, Heat and Unit Heaters. Disbound from a large 1931 industrial heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library. Slight damp stain on outer edge.