I have ( oh my ) 9 machines.........all different of course.......so all different bobbins..........I keep my bobbins in those little pill boxes from the drug store.......the ones that have all the days of the week on them...and on the side of each of those boxes, I have written the machine that it goes with.......and all the bobbins for each machine go only into their individually marked boxes............these boxes are good, they keep the bobbins all separated and they don't be rolling around and unwrapping themselves -
I too was wondering how to tell if a bobbin will fit a machine without trying it out on the machine itself )could damage that).......I inherited a big bag full of older ones and am not sure about how to use them............suggestions????