1959 royal clipper back gasket
I have what appears to be a 1959 Royal Clipper that belonged to my grandfather. I had been wearing it as it still kept perfect time after all these years. I have an issue with the back coming off. I took it to a jeweler to have it put back on but it came right back off a couple of days later. I then took it to another jeweler and the same thing. I just stuck it in a drawer after that untill recently. I have been looking at it and it appears the issue is it is missing the gasket that goes under the back. The back says that it is water proof and I doubt it was like that without any sort of gasket in place. I can screw the back on but to get it tight it lowers to the point it interferes with the self winding mechanism. I was wondering if any of you could assist me with finding a replacement gasket for it. I have been to yet another jeweler but they could not help.