Original paint trade vintage catalog for THE VORTEX MANUFACTURING COMPANY, was located at 1978 West 77th Street, Cleveland, OH. Manufacturers of Dens-tect Dampproofing and Par-Lock Plaster Key. Applied by special air gun. Unbound from a large 1938 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. Nice graphics. A marvelous addition to your retro paint & coatings library.