Original window trade vintage catalog for MASTER METAL STRIP SERVICE, INC. Main office and factory was located at 1720 North Kilbourn Avenue, Chicago, IL. Manufacturers of Sash Balances for windows. Master equipment no 400, 600 and 800, specs given, frame details and suggestions. Quick and easy installation. Unbound from a large 1954 architectural catalog, this unique old four page technical brochure would display wonderful matted and framed. A fabulous addition to your retro window sash balance library. Pages are detached and may contain a small amount of residual glue on edge.