Original window trade vintage catalog for CLEVELAND LOCK WORKS. Main office and factory was located 1290 East 53rd Street, Cleveland, OH. (Formerly Columbian Lock Division). Manufacturers of Window Sash Pulleys. Topics discussed are Grooves, Finishes and Bearings. Numerous images, product details and architect specifications are provided. Unbound from a large 1941 architectural catalog, this unique old two page technical specifications brochure would display wonderful matted and framed. Nice graphics. A terrific addition to your retro window sash pulleys library. Pages are detached and may contain a small amount of residual glue on edge.