Original locker trade vintage catalog for MASTER LOCK COMPANY. School Division, was located in Milwaukee, WI. Combination Proven Protection. Manufacturers of modern locks for schools, industries, hospitals, clubs and other public and private buildings. Model 1500 regular, 1525 key controlled, 1630 automatic and 1654 spring bolt features, summary specifications provided. Unbound from a large 1964 architectural catalog, this unique old four page technical specifications brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro locker equipment collection. Pages are detached and may contain a small amount of residual glue on edge. Form No. D S-1.