Greubel Forsey Balancier Convexe S2 P1230 Watch

The very dark tone of the carbon reinforces the feeling of a very compact piece. To impose as complex a geometry on carbon as that of the Balancier Convexe S² convex case is an unprecedented move in watchmaking. It requires a precise combination of temperature and pressure. Heat makes the carbon more flexible to work with; pressure gives it its shape. A conventional case usually requires 2 tonnes of pressure per square centimetre. For Greubel Forsey's signature convex case, it was necessary to apply 16 tonnes: 8 times more than is conventional. Each case is individually enhanced by the arrangement of its fibres, carefully controlled by Greubel Forsey to create the perfect profile. The direction of the carbon fibres is a top priority, so that they align with the curvature of the convex case, which is underlined by the hand finishing. At 12 and 6 o'clock, the two converging lines give the Balancier Convexe S² a 3D geometry of unequalled complexity. It delivers an unprecedented volume, giving way to a vast open space under the sapphire crystal at 6 o'clock. Within, the 30° Inclined Balance Wheel that has been completely redesigned to fit the new proportions of the carbon case, has plenty of space. The 303-part movement delivering a 72-hour chronometric power reserve has a perfectly defined architecture, with three large hand-decorated bridges on the movement side. Finally, the relief engraving on the 3D barrel cover blends seamlessly into the redesigned case.