Frederique Constant FC-975N4H9 Classic Tourbillon Perpetual Calendar Manufacture 18K Rose Gold Case
By: Frederique Constant
Skeleton navy blue color dial. Hand polished white hands.
18K Rose gold polished 3-parts case. 42 mm diameter. Convex sapphire crystal. See-through case back. Water-resistant up to 3 ATM.
Navy blue alligator strap.
FC-975 Manufacture caliber, automatic tourbillon & perpetual calendar. Perlage & Côtes de Genève decoration on movement. 33 jewels, 38 hours power reserve, 28’800 alt/h. Silicium escapement wheel and anchor.
Frederique Constant’s Perpetual Calendar Tourbillon Manufacture contributes to the quest for ultimate precision. The primary function being to counterbalance the errors due to the effect of the Earth’s gravity on a movement in a vertical position. The titular mechanism of the timepieces is the new automatic FC-975 in-house movement.
This grand complication bears simultaneously: a silicium escapement wheel and anchor, a smart weight balance wheel, and a Tourbillon cage. These timepieces are impressive in horological terms as the Tourbillon has been developed in an industrialized process to the last detail. It’s the accumulation of watchmaking knowledge over the years which allowed this timepiece to emerge. The Perpetual Calendar Manufacture Tourbillon guarantees an exceptional level of performance and the highest standards of craftsmanship distinguished by the features mentioned above.
Frederique Constant patented the perfectly balanced cage composed of 80 components all produced with a precision of 1-2 micron (0.001-0.002 mm) by the CNC machine in the Manufacture’s ateliers. In order to achieve the highest degree of precision, small weights are added in the Tourbillon’s cage to obtain a perfect balance. When the Tourbillon is constructed, the balance in the cage is slightly unequal, as the escapement wheel and anchor are decentered. Frederique Constant added a “smart screw” system on the outer edge of the Tourbillon to equalize the weight and deliver a perfect balance in the cage. This results in a more stable amplitude and rate.