differences I see between my willie w9 and that singer 9 is the singer, has its spool on the removable plate the willie is a round plate no pin,, willie's spool is the loop type mount mid arm...
both still 3 plates at the bobbin
I have to hand it to you people doing these quilts, that fine detail work goes over my head,,, I think I'm doing good to get 6 inches sewn in a straight line..
Those thraeders I looked but only at jo ann's and wally's then ask other people and they hadn't seen any in a long time... I use to use those for tooth picks