I am looking for a 1952 Williams score motor and cam assembly. I bought a machine without the motor, etc. The schematics I have do not say the part number of the motor (like some do). It has the mounting frame and contact switches in place. At some point someone removed the motor and cams. Would there be some way I can find what I need (as well as obtaining the parts). During that era, do other years use the same parts? (I have found other schematics that use a 6738 motor) The schematic shows it is a 45V circuit. Most other schematics in that era show a 50V circuit. Will a 50V motor work? How would I know what the RPM's are for the motor. More importantly, what would the cam unit look like? Looking at the contact switches, it is 2 cams opening/closing the switches. The machine is in good shape other than the missing motor unit.