Tourbillon
A watch equipped with an intricate rotating carriage containing the balance wheel in the middle adjacent to the escapement. The carriage rotates about its axis once a minute. It compensates for the effect of the earth's gravity and improves the accuracy of the watch.
Fusee-and-chain transmission
An original, early drive system in a spring-powered watch. It assures that the going train is driven with the same moment, or torque, regardless of the state of wind of the spring barrel. It improves the accuracy of the watch.
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The first LANGE | TOURBILLON of the new era incorporates a technically delightful feature never before implemented in a wristwatch quite this way: The going train is driven by a | fusee-and-chain transmission. The edition was limited to 50 watches in platinum and 150 in gold.

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