Original windows trade vintage catalog for STEEL WINDOW INSTITUTE.  Main office was located in Cheltenham, PA.

This catalog presents the latest authentic Institute recommendations for standard types and sizes of steel windows. All sizes shown, except for residential casements, are in conformity with the principles of dimensional coordination of building materials promoted by American Standards Association ProjectA62, sponsored by the American Institute of Architects and the Producers' Council, Inc. Has numerous product images with detailed descriptions, illustrations, uses, applications, specifications and dimensions are provided. 

Unbound from a large 1958 architectural product catalog, this unique old sixteen-page brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your vintage construction materials library.