And how does mere movement power it? Cheers
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I’ve not heard the phrase ‘automatic watch’ before.
I’ve seen them advertised as self-winding or perpetual watches.
There is a weight in the back of the watch that spins around when the wearer moves about. It cranks on the spring inside to tighten it up just as winding the watch by hand does.
There’s also a clutch of sorts that allows some slippage of the mechanism. Allowing enough energy from the weight moving to crank up the spring, but also slipping when the spring is fully wound.
(Those clutches and cranks break quite easily, leaving a spinning weight that does nothing. And it has to be cranked by hand.
I have one, and the self-winding broke within a few months. For anyone interested, they’re cool and all, but rather expensive. Best not to be worn daily or during any fast pace activity. Just very special occasions.
Sudden impacts, like closing a car door or jumping, not good for it.)
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