Original classroom trade vintage catalog for PITTSBURGH PLATE GLASS COMPANY. Main office was located at One Gateway Center, Pittsburgh, PA. Manufacturers of Nucite chalkboards, the time proven glass chalkboard. Surface finished for glare control. Choice of six sight-engineered colors. Installed in schools, colleges, government agencies and other institutions. This unique old 1964 four page architectural design brochure would make a marvelous addition to your retro collection. Pages are loose and contain a small amount of residual glue on edge