This is such a huge deal in horology -- and goes to serve the debate of whether or not its worthwhile to have your watch on a winder for two months. Despite the fact that this piece is hand winding, it has a variable speed mechanism which allows the wearer to take it off and two months later, the perpetual calendar settings stay up to snuff:
https://www.forbes.com/sites/robert...00-twin-beat-perpetual-calendar/#ea4b94d689e1
"To begin with the Vacheron Constantin Traditionnelle Twin Beat Perpetual Calendar watch is revolutionary in that it can be adjusted according to the wearer’s activity levels with the press of a button. This means that the patented system can offer more power reserve than the “stated” four days (when active) and gives up to 65 days of power reserve when in standby mode. Essentially, when the 42mm platinum watch is being worn, it beats at a high frequency of 5 Hz (36,000 vibrations per hour) in order to accurately track the hours and minutes, and the perpetual calendar functions, including date, month, and leap year. However, when the watch is taken off the wrist, the wearer can switch frequencies so that the movement slows down to 1.2 Hz (8,640 vibrations per hour) in order to continue operating with a power reserve of at least 65 days."
Will never be repped, but exciting nonetheless ...
https://www.forbes.com/sites/robert...00-twin-beat-perpetual-calendar/#ea4b94d689e1
"To begin with the Vacheron Constantin Traditionnelle Twin Beat Perpetual Calendar watch is revolutionary in that it can be adjusted according to the wearer’s activity levels with the press of a button. This means that the patented system can offer more power reserve than the “stated” four days (when active) and gives up to 65 days of power reserve when in standby mode. Essentially, when the 42mm platinum watch is being worn, it beats at a high frequency of 5 Hz (36,000 vibrations per hour) in order to accurately track the hours and minutes, and the perpetual calendar functions, including date, month, and leap year. However, when the watch is taken off the wrist, the wearer can switch frequencies so that the movement slows down to 1.2 Hz (8,640 vibrations per hour) in order to continue operating with a power reserve of at least 65 days."
Will never be repped, but exciting nonetheless ...
