Original classroom trade vintage catalog for BIRDSBORO CORPORATION. Main office was located in Port Carbon, PA. Manufacturers of Mirawal chalkboard for classrooms, containing asbestos. Porcelain enamel glass-fused to steel architectural specifications. Typical trim sections used to install are illustrated. Panel features with part number listed. This unique old 1964 four page architectural brochure would make a marvelous addition to your retro design library. Pages are loose and contain a small amount of residual glue on edge