Stopped at an estate sale today. There was a white rotary in a nice cabinet, asking $145, which I thought high. It had a strange, to me, looking bobbin. Not a shuttle, but didnt have a case like I am used to. Looked like it had a pc of spring steel or something in the front of it. It was accessed through a tshirt shaped cover thapoppeup and off. Any insight on this machine. I may have to go back, I can hear it calling me. LOL