I had fun poking around a flea market today, searching for old machines... I have really been wanting to get a 15-91 for FMQ. I found a Singer with the serial # Y8821760, a treadle. When I looked it up online it said it was a 15K. Another one I found was a 15-90... So, how much difference is there between a 15-90 and a 15-91, and also a 15K?
All the machines I found today, save one, were in pretty bad shape. When I moved the wheels, they didn't sew freely. Only one still felt like precision movement when I turned the wheel. Any of these badly needs a big cleaning.
I would appreciate any thoughts/ideas on these. Prices were about $45-$75, and $145 for a Pfaff 135 that looked mint except the cord needs to be replaced. Advice?