I have a deep-diving Swiss watch that developed a known crown issue—the threads stripped after about six months of use and the crown no longer screws down. This was a few years ago (2022), I sent it to the U.S. authorized repair center. At the time, they told me they didn’t have the correct crown but could attempt a repair. However, they couldn’t guarantee the work since they lacked the proper parts, and they warned that the issue would likely recur if the crown was screwed down too often…

Authorized watch repair question on known issue