PATEK PHILIPPE Perpetual calendar(PERPETUAL CALENDAR) unused Watch
PERPETUAL CALENDARPerpetual calendar
Patek Philippe is a timepiece that takes the ultimate challenge in research, in order to be at the pinnacle of watchmaking. Because perpetual means "permanent", it is also called perpetual calendar. It is possible to automatically determine the end of each month and the leap year. So, not only one year, but also every four years, the adjustment is done automatically without any manual work. The perpetual calendar determines leap years up to 2100 AD. The year 2100 in the Christian era is divisible by 100 and is not a leap year due to the rules of the Gregorian calendar, so adjustments are required. In order to determine the four-year cycle of a leap year, the perpetual calendar is equipped with a complex mechanism that rotates once every four years. As the world's most complex watch, it has timeless value.
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