The only way to overwind a mechanical watch is to use pliers. I've tried. Perhap things go wrong more often when winding than on other occasions. Watches I've broken have generally been "overdropped onto hard surfaces", or "over fiddled with". ;)Originally Posted by Kettlebelly
Automatics are designed so that the mainspring slips when fully wound. Otherwise the automatic winding system would be under nearly constant pressure.
Best wishes,
Bob