They are said to be eternal.
The Perpetual Calendar constitutes the high
nobility of watchmaking, they which will only need to be adjusted to 2100, 2200 or 2300. Imagine the complexity of a movement capable of recognizing months of 28 to 31 days, leap years included .
It was not until 1925 that Patek Philippe adapted to the wrist the principle of an “astronomical repeater watch with equation of time and perpetual calendar” invented in 1770 by the French watchmaker Jean-Antoine Lépine, for an order from Louis XV.
The brilliant Breguet revisited it with elegance, imagining in 1780 a perpetual repeater watch equipped with a “shaking” oscillating weight, allowing the movements of the body to automatically wind its mechanism.
In 2023, the brand's Classic collection reinterprets the concept with its new Perpetual Calendar 7327. Its movement has a mechanical “memory” of four years, or 1,461 days, with its gear reduction system from the wheel…
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