In order to respond to the specific requirements of the tourbillon in a wristwatch, Greubel Forsey developed an innovative double tourbillon. One carriage, rotating in 60 seconds and inclined at 30°, rotates inside another, which is itself rotating every four minutes. Rotating a tourbillon inside another tourbillon in this manner averages out errors induced by the force of gravity on the balance. The construction allows for superior chronometric performance; a minimum volume/maximum balance diameter ratio; and enables the superbly finished mechanism to be appreciated visually.
The Double Tourbillon 30° is now available in two renditions: 'Vision' and 'Secret'. Vision features an open dial displaying the complication for all to view, while 'Secret' conceals its artistry behind the dial while allowing viewing discreetly through the display back.
|Bracelet strap:||Leather||Size:||Ø 44.0 mm|
|Buckle:||Folding Buckle||Thickness:||16.0 mm|
|Movement:|| Not available |
|Functions:||Tourbillon, Power-reserve indication|
|Sources info: World Tempus|