It's a solidly built machine and worth a bit of effort. Have you had the needle and bobbin plate off, and investigated around the feed dogs and under the bobbin case? Check (double and tripple) for threads, bits of a broken needle, etc. I think you need to unscrew a few screws to get the top off the machine. Keep on oiling, when something is stuck, it often takes a bit of patience and persistance to get it loose again. Tentative applications of oil a few times a day, wiggeling the hand wheel a bit, often get's it going. I can only give you the basic routine unfortnately, maybe you all onto it, but as said, often it's a case of keeping it up for a few days until it frees up.
Last edited by Mickey2; 08-12-2016 at 11:10 AM.