Bobbins
The one on the left looks like a Featherweight bobbin. The ones on the right look like class 15, as they are not slightly rounded on the top. Try sending a picture of the bobbin case to Sew-classic.com and perhaps Jenny can help you. She has sources.
Donna
Last edited by DonnaMiller; 06-21-2015 at 06:37 PM.
Reason: directional