Greubel Forsey GF02

GF02 is a manual-winding in-house caliber from Greubel Forsey, introduced in 2006. It belongs to the GF family and features a Quadruple Tourbillon mechanism with four tourbillon cages operating through a spherical differential system. This construction enables the cages to rotate on multiple axes for optimized timekeeping. The movement remains in production.