Girard-Perregaux GP9900

The GP9900 is a manual-winding in-house caliber from Girard-Perregaux, belonging to the GP9000 family. It features a tri-axial tourbillon, a complex mechanism in which the carriage rotates on three axes to compensate for gravitational effects across multiple positions. The movement remains in production and serves as a flagship complication within the brand's contemporary collection.