Original recreation trade vintage catalog for NEW YORK AIR BRAKE COMPANY, was located in Providence, RI. Manufacturers of Vacuum Filtration Systems for swimming pool installations. Products include Model 1210 Chem-O-Feeder for precise liquid chemical proportioning, Omega Model 25-01 Dry Feeder for accurate feeding of dry filter aids and dry treatment chemicals, Builders-Providence Chlorinizers Model 845 and 846 are illustrated. Recommended specifications for vacuum diatomite filtration system is provided. Unbound from a large 1964 architectural catalog, this unique old eight page technical brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro recreational equipment collection. Pages are detached and contain a small amount of residual glue on edge.