The pusher cap is held in place with a small spring clip...this is clearly not ceramic, but uses the same idea:
Unlike a Speedmaster Pro that uses a screw to hold the cap on, and would typically have Loctite on the threads, the clip is relatively fragile. If the pusher was caught on something it could have been pulled enough to pop the clip off, and then the pusher would be gone....
Not sure I would want a boutique messing with this, unless they had a proper watchmaker there (not a Boutique Technician, who are essentially hired off the street, given a few weeks training, and then let loose on the watches).
Cheers, Al
Click to expand...