I was working on an A. Schild 1187 movement. While cleaning the lower jewel setting (Incabloc) the cap jewel flew and I can't find it. How does one get a replacement? I tried several that I have already but none fit. I suppose I can see if I can get an 1187 scrap movement and see if I cant scavenge it but can one be ordered? Perhaps it is interchangeable with other watch movements? This whole interchangeability issue kind of stumps me.