Original metal trade vintage catalog for VAN DORN IRON WORKS COMPANY. Main office and plant was located at 2685 East 79 Street, Cleveland, OH. Manufacturers of jail and prison maximum security controls. Fully selective electrical operating system, including emergency manual release mechanism for sliding cell doors. Pictured is Dauphin County Jail, Harrisburg, PA. Discussed is how the Van Dorn controls operates. Unbound from a large 1964 architectural catalog, this unique old four page technical brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro metal construction library. Pages are detached and contain a small amount of residual glue on edge.