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  1. Royal Oak
  • Royal Oak Perpetual Calendar, Watch Reference 26252OR.OO.D092CR.01
  • Royal Oak Perpetual Calendar, Watch Reference 26252OR.OO.D092CR.02
  • Royal Oak Perpetual Calendar, Watch Reference 25820ST.OO.0944ST.03
  • Royal Oak Perpetual Calendar, Watch Reference 25820ST.OO.0944ST.04
  • Royal Oak Perpetual Calendar, Watch Reference 25820ST.OO.0944ST.05
  • Royal Oak Openworked Perpetual Calendar, Watch Reference 25829ST.OO.0944ST.01
  • Royal Oak Openworked Royal Oak Perpetual calendar, Watch Reference 25829PT.OO.0944PT.01
Variations: Model 26252
  • Royal Oak Perpetual Calendar, Watch Reference 26252OR.OO.D092CR.02

    Perpetual Calendar

    Selfwinding perpetual calendar watch indicating the day, date, moon phases, month and leap years. 18-carat pink gold case, silvered dial, brown strap.

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      • Case Width 39.00 mm
      • Case Thickness 9.30 mm
      • Water Resistance 20 m


      18-carat pink gold case, sapphire crystal and caseback
      Silver-toned dial with “Grande Tapisserie” pattern, pink gold applied hour-markers and Royal Oak hands with luminescent coating
      Hand-stitched “large square scale” brown alligator strap with 18-carat pink gold AP folding clasp
      Perpetual calendar with day, date, moon phases, months, leap years, hours, minutes
      Movement thickness with module
      4.00 mm
      Total diameter
      12½ mm
      Type of balance
      With Variable inertia blocks
      Frequency of balance wheel
      2,75 (=19'800 alternances/hour) Hz
      Type of balance-spring stud-holder
      Mobile stud
      Balance-spring type
      Direction of automatic winding
      Type of oscillating weight
      Support and weight segment in 21-carat gold
      Number of jewels
      Power reserve
      40 h
      Number of parts


      • Extra-thin movement
      • Suspended barrel
      • Shake of the oscillating weight garanteed thanks to annular ring running on four jewels. Manual finishing of the bridges (polished bevels, satinbrushed edges, Perlage on the recesses)
      • Hand crafted decorative engravings on oscillating weight componants
      • Moonphase made with Physical Vapor Deposited metal onto sapphire
      • Oscillating weight can be custom decorated upon customer's request
      • Perpetual calendar / Date / Day / Month / Leap year / Moonphases


      Calibre 2120 / 2802 Manufacture

      Calibre 2120 / 2802 Manufacture, front
      Calibre 2120 / 2802 Manufacture, back
      DOWNLOAD USER MANUAL (PDF) see all watches with the calibre

    Audemars Piguet History

    The perpetual calendar has a memory capable of mastering calendar irregularities through the year 2100.

    to break the rules,
    you must first master

    the vallée de joux. for millennia a harsh,
    unyielding environment; and since 1875 the
    home of audemars piguet, in the village of
    le brassus.

    discover our story