Audemars Piguet
The Perpetual Calendar: Mechanical Genius in Miniature
How a 260-year-old mechanical complication still tracks leap years, irregular months, and the quirks of the Gregorian calendar — with nothing but gears, cams, and levers.
The Perpetual Calendar: Mechanical Genius in Miniature
How a 260-year-old mechanical complication still tracks leap years, irregular months, and the quirks of the Gregorian calendar — with nothing but gears, cams, and levers.