Hello, friends. The watch, with the crown open, was bumped off a table onto a hard floor. POW! The stem near the crown snapped off. A bit of research here told me this may be a repairable fix. I uncased the movement and popped the release clutch to get the remaining stem out of the movement. This is shown in the pictures. Big questions: 1. where do I source a new working stem? 2. How do I get the Patek crown off the existing broken stem? 3. Anything else to know? Any help here would be appreciated. Thank you!