Greubel Forsey watch

The secret of the quadruple tourbillon

Robert Greubel and Stephen Forsey partnered to form Greubel Forsey to make some of the world’s most accurate timepieces.

In 2011, they won an international timing competition awarded by the Le Locle Watch Museum for using multiple tourbillons and tilt balances.

The latest timepiece is the “Quadruple Tourbillon Secret” of 2012, which uses two dual tourbillons for a total of four heavy tourbillons. These tourbillons create four spinning cages that distribute torque to the other two wheels spinning at different speeds.

The transparent back cover on the watch allows the owner to see the watch’s movements, which are interconnected and combined by a spherical differential.

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