Main mechanism motor for all Seeburg 45rpm Select-O-Matic record changer mechanisms from model B thru STD-4. The motor is clean and in excellent overall condition. It has been tested using a device designed for testing these motors and performs to specifications. The rotor turns freely and no-load speed is 1738rpm measured with an electronic tachometer. The rubber bushings are flexible and not rotted. Wires are plastic type and wire colors are bright, easily identifiable.This motor can also be used on the 78rpm 100-A with slight modifications. Please contact me through ebay with any questions.