Why This Obsolete Mechanism Makes Watches More Expensive

A tourbillon (French for "whirlwind") is a centuries-old mechanism built inside some of the world's most expensive watches. It was originally designed to improve the accuracy of pocket watches by rotating the escapement and balance wheel to help counter the effects of gravity.
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[@doctorpanigrahi9975]

It's not Expensive ! We can produce 2 nm chips with Photo Lithography . Tourbillion is easier to make than your mobile chip .