Original classroom trade vintage catalog for NELSON-ADAMS COMPANY.  Main office was located at 210 Ryan Way South, San Francisco, CA. Manufacturers of classroom chalkboards containing asbestos. Nacocentury premium chalkboard combined the features of a cement-asbestos base and Naco's superior writing surface making this board an ideal choice for permanent type builds requiring lifetime service. Also manufactured were Nacoslate, Nacoplate, Nacosteel, Natural Slate. Specifications provided, full color chart of the eight standard colors. Vinylcorks, pinboards, corks listed with color chart. This unique 1964 old four page architectural brochure would make a marvelous addition to your retro engineering design collection. Pages are loose and contain a small amount of residual glue on edge