Original electrical trade vintage catalog for D. W. ONAN & SONS INC. Main office was located in Minneapolis, MN. Manufacturers of portable electric plants for construction jobs, air-cooled, gasoline-driven. Single Cylinder models 3600 RPM, 1800RPM, Two Cylinder models 1800, 10,000 Watts A.C. featured. Optional equipment skid-mounted 10CW-3R, trailer mounted 10CW-3r shown. Nationwide sales and service representatives listed on last page. Disbound from a large 1954 electrical construction materials book, this unique old four page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library.