Airtech model L-63-61 rotary vane vacuum pump, serial no N10057552. 3 HP 208-230/460 motor.  Serviced, installed new exhaust filters. Runs quietly, pulls good vacuum. For those not familiar with Airtech, they are essentially duplicates of busch.  This pump would be equal to a model RC0063. Call Dale Frazier at 660-367-4775 with any questions.