The dual-frequency watch
Vacheron Constantin is generally regarded as a demure, rather traditional brand. It is pushing back against this cliché with a radical innovation in the shape of a dualfrequency watch featuring a resolutely modern design. At the press of a pusher, the Traditional Twin Beat Perpetual Calendar changes frequency and hence also its level of autonomy. To achieve this, it is equipped with a single energy source, a pair of large barrels. From there, everything diverges. Two separate gear trains are each connected to a different regulating organ. The first operates at 5 Hz, corresponding to 36,000 vibrations per hour. This is the first time that Vacheron Constantin has used this high frequency, which guarantees excellent protection of timekeeping precision from potential impacts. It is reserved for an active wearer, with the watch actually on the wrist, a mode in which the watch enjoys four days of autonomy. The second one runs at an exceptionally low speed of 1.2 Hz, or 8,640 vibrations per hour. This slowness consumes little energy and raises the power reserve to a full 65 days. This mode is designed for a watch placed in resting position, off the wrist. The Twin Beat takes things even further, in that it also provides a perpetual calendar function for anything from four to 65 days. Always on time and always up to date, even after a two-month vacation ? A doubly unprecedented achievement !