Oh i re-read your message and see that you do say this model takes plastic bobbins. I will definitely buy some of those and it explains why the metal ones didn't fit the spindle very well. They work fine in the bobbin case and yield a perfect stitch but I won't be using these after today.It looks like only the 237 differs from the other "vintage" Singers in that most do use metal bobbins. Its important for people to know this because its easy to assume 237 would use metal bobbins like the others.
Last edited by QuiltnNan; 09-20-2019 at 06:30 AM.
Reason: shouting/all caps