Vacheron Constantin Traditionnelle Twin Beat Perpetual Calendar
With dual oscillators and an impressive 65-day standby power reserve, Vacheron Constantin's latest novelty has tongues wagging and we can understand why. Previously if a perpetual calendar was allowed to run down, re-setting its indications was difficult.
Traditional designs often need to be serviced by a watchmaker if the wearer needs to reset the date and—depending on the model—age and phrase of the moon. So what’s Vacheron Constantin's solution? A watch with a 'standby' mode, in which the power reserve is 65 days over two months of running time.
Thanks to an innovative and patent-pending mechanism, the Traditionnelle Twin Beat Perpetual Calendar has two frequencies that can be easily controlled by watch lovers such as ourselves, who can change it from active mode, which beats at 36,000vph, to standby mode, which slows it to 8,640vph. To put it simply, this is Vacheron Constantin’s first low energy perpetual calendar (it’s taken a whopping four years to develop), and we’re here for it.
(Related: SIHH 2019: Tatler Watch Picks From Day 1)