[GreenKeys] Gear for M15 Synchronous motor

[Jim Haynes]

On Mon, 4 Jan 2010, Don Robert House wrote:

> I did not realize the pinion was different.  If someone can give me
> the part number I am sure I have several.
>
Yeah, for some reason prior to Model 28 the governed motors ran
at a different speed than the sync motors.

Looks like the main shaft gear is 74913 and the motor pinion is 74912
for 60wpm and 60 Hz sync motor.