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Quadruple Tourbillon

Greubel Forsey

The Quadruple Tourbillon uses two double-tourbillons - four tourbillon cages in total - working independently to average out and minimize gravitationally induced errors on the balance. A spherical differential connects the four rotating carriages, distributing torque between two wheels rotating at different speeds. this feat of engineering produces a mechanical ballet that plays out either visible through the dial, or through the case back on the refined Secret series.

Quadruple Tourbillon
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