This means that if you only wear your timepiece on special occasions, it can be carefully “wound” while you are not using it, ensuring that it stays running and displaying the correct time and date. A good watch winder will have a silent motor and will allow you to adjust the turns per day (TPD) so that you can configure it to your specific watch. This ensures that the mainspring stays wound. The time it takes for that to happen is known as its power reserve, and it varies across different models and brands, with some (such as the latest from the Panerai Luminor range) taking up to eight days to completely wind down.Ī watch winder is simply a device, either plug-in or battery-powered, that keeps a timepiece moving to replicate the effect of it being worn.
If the piece is left stationary for an extended period of time, the watch will eventually use up all the tension in the mainspring and the watch will stop. That motion is transferred to a small weight in the internal movement that oscillates back and forth and puts tension on the mainspring. During normal wear and use, automatic mechanical watches are kept wound and running via the movement of the wearer’s arm.
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