In 1955, the maison released the world's first perpetual calendar wristwatch with a leap year indicator; in 1978, it debuted the Calibre 2120/2800, the world's thinnest automatic perpetual ...

Normally, perpetual calendars all look fairly similar, with a commonality that has become part and parcel of watch design in general. This year, I think we saw the start of an era where the ...

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The dial offers a transparent view of the intricate perpetual calendar mechanism ... additional elements like the month, year and leap year indicators are also visible. All of these functions ...