SchRam Industriesm Air Compressor, Model WD-50,B-M WD900, Serial 53573-S, 10HP 208-220/460V 1760 RPM, 40C Rise Cont., Capacity 50 cubic ft of air at 1800 RPM, Bottom Outlet 2 1/4 in ID 7 in flanged OD, pressed steel tank 1964, Natl Board C88281, Max DP 200 PSI at 650F, Head/Shell 175, Fittings/Valves 1 in.