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An excellent example of the Second-Series ref. 5516 with the leap-year indicator at 12 o'clock, sans the 48-month scale; the watch seen here is presently part of the Pygmalion Gallery's private collection (Image: Photo and watch, property of Pygmalion Gallery)

The Complete History of the Audemars Piguet Perpetual Calendar

The following article is written by Wei ‘Le Wei’ Koh, in collaboration with Michael...
Audemars Piguet yellow-gold perpetual calendar ref. 5516 from 1955 (Image © Revolution)

1955: Audemars Piguet ref. 5516, the First Perpetual Calendar Wristwatch with Leap Year Indication

It’s a leap year, and in the run-up to that special day Feb 29, Revolution takes a look at some of the Perpetual Calendars that mattered.
Da Vinci Beta 21 watch by IWC in several executions

Watch Design: The Spirit of Integration

The integrated bracelet watch has become an icon, one that emerged from the ’70s as a response to a design-centric world. Or did it?
Gerald Genta and his wife Evelyn Genta

The Gerald Genta Heritage Association is Born

Gerald Genta’s widow sets up a heritage association to preserve watch designer’s legacy and nurture a new generation of watch designers.
Patek Philippe Perpetual Calendar, Ref. 2438/1 Circa 1955

The Art of Online Watch Auctions at Christie’s

Christie’s explains why online watch auctions have been so successful and will continue to be.

Vintage