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WatchMaking Art

The Power Reserve


The mechanical watch operated either by automatic- or manual winding. In order to run at a regular rate a mechanical timepiece needs to have at least 30 per cent of its mainspring wound]. An automatic timepiece needs to be worn for about 10–15 hours before it is fully wound. The power reserve indicator displayed on the watch with automatic- winding movement shows how long a watch will function when not worn. The one displayed at a watch with the manual winding mechanism shows the time left for its next winding.


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