Original window trade vintage catalog for G. F. S. ZIMMERMAN COMPANY. Main office and factory was located in Fredrick, MD. Manufacturers of Fasteners for Shutters and Casements. Zimmerman fasteners make shutters useful as well as ornamental. Window protection. Numerous illustrations and architect specifications are provided. Unbound from a large 1938 architectural catalog, this unique old one page technical brochure would display wonderful matted and framed. Nice graphics. A terrific addition to your retro window fasteners library.