I dressed down the rough damaged edge of the bobbin case. I’d say that this machine, at least with this BC in it, was not intended to have needles other than 206x13 used in it. That is, if the damage was caused by using the wrong needle. There were no 15x1 needles in the machine or the case; only 206x13 needles, so not knowing the history of the machine, one can only speculate.
I did a test-sew by turning the hand wheel by hand, and ran a short stitch line in 2 layers of cotton fabric. I tried the zigzag and multi-zigzag cams along the way, and the machine functioned flawlessly. Now....to get it into a treadle stand!
CD in Oklahoma