Videos
Power reserve indicator
Sunday, 17 May 2020
By Fondation de la Haute Horlogerie
1 min watch
The power-reserve indicator testifies to the quantity of energy available. It is at its highest level when the mainspring is entirely wound, and gradually dwindles as the latter uncoils. The display can be provided by a hand moving over the arc of a circle (sector), a graduated linear segment, a colored window or by other means.
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