The
spherical differential connecting the four rotating carriages of the Quadruple
Tourbillon is a prime example of Greubel Forsey's inventive approach as it
exhibits an unprecedented degree of complexity, refinement and timekeeping
performance.
The four asynchronous tourbillons independently contribute to its extremely
high accuracy.
The spherical differential acts like a car's differential in distributing torque between two wheels while allowing them to rotate at different speeds.
The two double-tourbillions are in an asymmetrical format to provide clear visibility to all carriages on the dial side, as well as providing an additional lateral view.