Bobbin Case Base - vintage original part. If your machine is jammed, do not force it! Chances are, your machine has thread caught behind the bobbin case base. Here is a video tutorial on how to remove that thread. If, however, the finger on your bobbin case base is broken off, then occasionally we will have original replacements available. When replacing it, make sure that the finger on the bobbin case base is returned to it's correct position under the needle plate.
If this is item is shown as 'out of stock', then check back from time to time. Stock can vary from day to day and as soon as we get these in they are quickly sold. Otherwise, be sure to click on the "In Stock Notification" to be notified of when we have more in our inventory.