Original plumbing trade vintage catalog for IN-SINK-ERATOR MANUFACTURING COMPANY. Main office was located in Racine, WI. Manufacturers of Food Waste Disposer, quick as a wink through any sink. The disposal with reversing action. Model 77 Special. Cross Section of construction features is pictured. Time-tested, kitchen proved. Shown are four easy steps to fastest, most inexpensive installation. Specs provided. Unbound from a large 1956 architectural catalog, this unique old four page technical specifications brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro plumbing equipment collection.