Original electrical trade vintage catalog for FOURJAY INDUSTRIES. Main office was located at 2801 Ontario Avenue, Dayton, OH. Manufacturers of acoustical baffle for sound system installations. Installed at Miami International Airport. PA paging speakers, fiber glass faceplates, grilles and mounting rings discussed. Model FS 8 W, SR 8 W, FR 8 W, DFS 8 W, DFR 8 W and more. Disbound from a large 1964 electrical construction materials book, this unique old four page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Pages are loose and contains a small amount of residual glue on edge.