Stokes model 24 PV freeze dryer, serial number 902-008-1, built in 1972, designed for full vacuum at -14.7 PSI, 4 each 12" wide x 24" long x 1" deep plates, 27" diameter x 32" deep vessel, Copeland compressor, wired 208/220/3/60, Crane Dynapump glycol pump, 3450 RPM, wired 230/460/3/60, maximum fluid temperature 300 degree Fahrenheit, with plate heat exchanger, 50 each plates 5" wide x 12-1/2" tall, with controls, requires Edwards vacuum pump.