Original heating trade vintage catalog for SUNDSTRAND ENGINEERING COMPANY, was located in Rockford, IL. Manufacturers of Oil Burner. Transformer Ignition Nozzle Assembly, Rota-Roll Fuel Unit. Model B-5 and C-6, A-3. Disbound from a large 1938 home builders heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library.