Thanks for the motor pictures.jboger wrote:Doug: I've attached a photo of the motor. This is clearly a Columbia motor. I see no signs of any swapping of motors, and the crank shaft lines up clearly and properly with the crank escutcheon.
Please understand that I didn't presume that your motor was swapped for a different motor.
The reason that I wanted to see a picture of the motor in your Standard Model A was to confirm my suspicion that it was a transitional Standard Model A. That is, having a slightly taller cabinet than the common earlier Standard Model A but having the vertically positioned mainspring barrel and, of course, the top mounted start/stop/speed lever.
The transitional Standard Model A is definitely more scarce than the commonly found Standard Model A with start/stop/speed control plunger shaft protruding from the cabinet front.
The very last (and rarest) version of the Standard Model A had an interesting horizontally positioned main spring barrel and a noticeably larger cabinet than prior models. I've only seen a couple of these in more than thirty years.
The motor on this last version of the Standard Model A also had a very interesting motor flaw: the factory installed rivet protruding from the mainspring barrel (to secure one end of the mainspring) tended to hang up on one of two motor pillars as the mainspring revolved - thus halting the running motor or at the very least slowing the motor considerably as the mainspring rivet attempted to pass each of the motor pillars! Ha! The way I fixed mine was to simply (and carefully) hand file the top of the rivet and voila! Fixed!
Anyway, yours is a transitional model. A good find and thanks again for sharing the pictures.
Doug