Original metal trade vintage catalog for BLAW-KNOX COMPANY, was located at 2041 Farmers Bank Building, Pittsburgh, PA. Manufacturers of Standard Steel Buildings, Flat and Gable Roofed. Type A, B, BB, C, CC, BXB, D, E and H. Unbound from a large 1936 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. A fantastic addition to your retro metal library.