And now for something completely different...
We found a sewing machine sitting free on the curb yesterday. It's a White model 2137 which as far as I can determine was in production in the later 1950s and early '60s.
I have no experience with these things, but after a light surface cleaning, it was easy to determine that the motor worked. I didn't see anything obviously broken either.
Cleaned everything up... As is so often the case with items from this era is was coated in waxy brown buildup from cigarette smoke.
I used silicone grease on its single plastic pinion and white lithium grease on all the cams. I opened up all the bearings and applied regular sewing machine oil. I used some rubber restoring stuff on the belt, and then made a couple adjustments. I didn't disassemble the motor, but it does go so maybe its best left alone anyway.
As fas as I can tell, it works!