Winding stem is a tempered steel component with a straw yellow finish. It is on this component that the crown is screwed and held in place with a threadlocker so that the crown does not unscrew when handled.

The entire component in contact with the movement will be lubricated with a thin layer of grease to ensure its proper functioning.

Winding pinion as well as the sliding pinion will be put in place on the winding stem. It will thus be able to carry out two essential tasks which is to wind the watch and to put it at the time.

On some watches it can also be used to adjust the date and some other complications such as the day or the moon phase for example.