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The other feature incorporates a differential gear on the axle, which allows the wheels to spin at different speeds.—Bradley Ford, Popular Mechanics, 2 Dec. 2022 The highly complicated timepiece offers a sky dance on two levels and is one of the most accurate tourbillon timepieces on the market thanks to two oscillators with differential gear mechanisms.—Roberta Naas, Forbes, 25 Oct. 2021
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