Reference 212.30.41.20.03.001. I sold my 2017 Seamaster last year with a micro-adjust clasp replacement on it, and I just discovered I still have the original clasp. Because it is worthless to me now, I am giving it away free to anyone in the United States who wants it. Won’t even ask for shipping because I’ll just drop it in a First Class envelope. Clasp is marked 1515/816 on the bottom. It has scratches on it, so this is NOT pristine — but you’re also getting it for free. Please don’t ask if this will fit any other bracelet — I don’t know. Also, no pins or screws are included — just the clasp. Please PM me with your shipping details if you want it. I won’t be checking this thread.