To each his own address
August 23, 2010 Models

To each his own address

The astronomical indications of each Audemars Piguet “Equation of Time” watch are calculated based on the geographical location of its owner – a feat made possible by the Manufacture’s Research and Development Laboratory.

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Astronomy plays a critical role in how we measure and perceive the passage of time – a relationship that can become incredibly complicated. In fact, there are only four days each year that have exactly 24 hours: April 15th, June 13th, September 1st and December 25th. This variation is caused by the Earth’s elliptical path around the Sun and the tilt of the Earth’s axis of rotation. The equation of time is the difference between the true solar time and the time given by terrestrial clocks.

Audemars Piguet’s “Equation of Time” watch indicates this discrepancy with precision. To indicate the mean solar culmination time and the hours of sunrise and sunset, the dials of this exceptional mechanism take into account the exact location desired by its owner. When a client acquires one of these watches, the name of his or her city and the mean solar culmination time at this location are engraved on the watch’s inner rim.

“Sometimes clients want to obtain ephemeris data based on the coordinates of their rooftops,” observes Gilles Pellet, head of Audemars Piguet’s Research and Development Laboratory since 1997. Any location is possible, from a skyscraper in Tokyo to a Texas ranch. Among its most prestigious personalizations, Audemars Piguet counts the White House in Washington, DC, engraved upon the request of former U.S. President Bill Clinton. “One time, we received a request that indicated “Daheim” but we couldn’t find the city anywhere in the world. It turns out that this German word means “at my house”. It’s the name that the owner wanted to have engraved on his watch. Fortunately, he informed us of the coordinates so we could do the calculations,” recounts Pellet with a smile.

EOT models

EOT models

  • Some Audemars Piguet’s "Equation of time"

    Royal Oak EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. 18-carat pink gold case, silvered dial, brown strap.

    View Details
    Reference 26603OR.OO.D092CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Royal Oak EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. Stainless steel case, silvered dial, black strap.

    View Details
    Reference 26603ST.OO.D002CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Jules Audemars EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. 18-carat white gold case, silvered dial, black strap.

    View Details
    Reference 26003BC.OO.D002CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Jules Audemars EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. 18-carat yellow gold case, silvered dial, brown strap.

    View Details
    Reference 26003BA.OO.D088CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Jules Audemars EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. 18-carat pink gold case, black dial, black strap.

    View Details
    Reference 26003OR.OO.D002CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Jules Audemars EQUATION OF TIME

    Selfwinding equation of time watch with sunrise and sunset times and perpetual calendar with astronomic moon. 18-carat pink gold case, silvered dial, brown strap.

    View Details
    Reference 26003OR.OO.D088CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back
  • Some Audemars Piguet’s "Equation of time"

    Jules Audemars EQUATION OF TIME

    Selfwinding equation of time skeleton watch with sunrise and sunset times and perpetual calendar with astronomic moon. 950 platinum case, transparent dial, black strap.

    View Details
    Reference 26053PT.OO.D002CR.01 Thumbnail

    Calibre 2120 / 2808 Manufacture

    Calibre 2120 / 2808 Manufacture, front
    Front
    Calibre 2120 / 2808 Manufacture, back
    Back