I have a question to all Singer 319W owners. I posted a picture of my machine a few pages back. What # bobbin case is the original? The bobbin case that came with my machine is a vintage Simanco 173058 (the closed type). I see some online stores list this bobbin as the replacement part. Yet, I saw on ebay a posting for the "open" bobbin case where the seller states that if you're using the closed type it's the wrong one. Huh? Can you please let me know what bobbin you have in yours? I would rather not have to buy a new bobbin case, but I also would prefer the correct one! Thanks.