Originally Posted by melinda1962

I think the there is a modified bobbin case for the 319 that has a cutaway to allow for the 15x1 needle, and I read about altering the original ones to make the 15x1 needle work. Some of the bobbin cases are not interchangable because of a slot in the side of the bobbin case that has to be there because of a keyway in the bobbin case holder.