When worn, the Traditionnelle Twin Beat Perpetual Calendar by Vacheron Constantin, beats at a high frequency that is aligned with modern active lifestyles, displaying the hours, minutes, date, month, leap year cycle and power reserve on its dial.
When the watch is not being worn, its in-house developed calibre 3610 QP can be slowed down in order to guarantee an extended power reserve of at least 65 days.
Patent-pending system for lossless timekeeping transition between high-frequency Active mode (5Hz) and low-frequency Standby mode (1.2Hz).
Standby mode unlocks unprecedented extension of power reserve (up to 65 days of stable timekeeping).
Hyper-compact (42mm diameter, 12.3mm thick) despite high complication and extended power reserve.
A Perpetual Calendar That Comes Closest To Operating In Perpetuity
The Traditionnelle Twin Beat Perpetual Calendar utilizes a patent-pending mechanical system that allows instantaneous switching between Active mode (5Hz, 36,000 vph), and Standby mode (1.2Hz, 8,640 vph).
Both the Active and Standby balances are driven by the same mainspring barrel, which is the most efficient way of distributing energy and the only way to have a single power-reserve indication.
Made by design
Movement plates and bridges are decorated with Côtes de Genève and then treated with NAC, a dark coating that offers superior resistance and durability compared with other similar-looking treatments.
On the dial, the very 18th-century art of engine turning and frosted finish are transmuted into clean radial guillochage and sand-blasted surfaces.
In order to perfectly achieve this union of tradition and modernity, the dial is made in two main segments in a multi-stage process. A gold dial segment is decorated with hand-guillochage, and then fitted within an outer segment of sapphire crystal.
Gold hour indexes are then set into the sapphire-crystal dial segment, which is further laser-engraved and ink-filled for a sleek, seamless appearance.