My daughter has my mother's vintage Singer and we are on opposite sides of the country, so I can't check up on it now. She says the manual says 15K88, but the receipt (August, 1950) says it's a 15K90.
Is this similar to the machines you're all talking about? I know it needs to visit someone who could repair/replace the wiring and give it a good going-over; will see about doing that when we're back in Reno this fall.
Is this a desirable machine for quilting? If it can be used for free-motion quilting, what foot would I need?
These old machines are a mystery to me, but I'd like to learn more about them.