Automatic: Watches with automatic mechanisms do not require manual winding, as they wind with the movement of the hand by rotating a rotor that coils the spring.
Eco - Drive: Watches with Eco-Drive mechanism convert any kind of light into energy that powers the watch. With a full charge, it can operate for months even in the dark, without requiring regular battery replacement.
Solar: Watches with solar mechanism convert solar energy into electrical energy, which is stored in a rechargeable battery and used to power the watch.
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