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It’s essentially a fancy watch spring mechanism. So the open spot on the bottom of the dial is the tourbillion as it unwinds it rotates around.
Huh
So you gotta wind it?
Might be automatic. That way the movement of the arm winds it
That explains why Trump fails his arms around during his rambling speeches.
Generally yes, like the other reply said it might be automatic and self winding. It’s a style of mechanical watch though so something somehow has to tension the spring that makes the watch run.