Tourbillon/en

Tourbillon

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Tourbillon Käfig

A tourbillon is an addition to the mechanics of a watch escapement. Invented in 1795 by French watchmaker Abraham-Louis Breguet, a tourbillon counters the effects of gravity by mounting the escapement and balance wheel in a rotating cage, ostensibly in order to negate the effect of gravity when the timepiece (and thus the escapement) is rotated.