What is the crown of a watch?
The crown (often called the winding crown or winder) is positioned on the case middle and allows winding, hand setting and often date or GMT hand setting. It is linked to the movement through the winding stem passing through a hole in the case. For waterproofing purposes, simple gaskets are used in water-resistant watches. On diving/sports models, the crown may be screw-down whereby it screws onto a threaded tube, which protrudes from the case of the watch.
