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Power reserve : ウィキペディア英語版 | Power reserve indicator
Power Reserve Indicator (originally called フランス語:Réserve de Marche) is a complication of the watch, which is designed to show the amount of remaining stored energy. The power reserve indicator indicates the tension on the mainspring at any particular moment. ==Overview== The power reserve indicator is one of the most useful features of a mechanical watch besides the actual time display. A mechanical watch is 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. On a manual winding watch, it shows the time left until the watch needs winding.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Power reserve indicator」の詳細全文を読む
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