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Perpetual Calendar
Selfwinding perpetual calendar watch indicating the day, date, moon phases, month and leap years. Stainless steel case, blue grey dial, stainless steel bracelet.
Explore Royal Oak
Royal Oak To break the rules, you must first master them. 
Savoir-faire Astronomy Complications 
Story The fabulous design of “Grand Tapisserie” Details
- Case Width 39.00 mm
- Case Thickness 9.30 mm
- Water Resistance 20 m
Specifications
- Case
- Sapphire crystal and caseback, water-resistant to 20 m
- Dial
- «Grande Tapisserie» pattern, white gold applied hour-markers with luminescent coating, white gold Royal Oak hands with luminescent coating
- Bracelet
- Stainless steel AP folding clasp
- Reference
- 25820ST.OO.0944ST.04
- Functions
- 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
- Flat
- Direction of automatic winding
- Bidirectional
- Type of oscillating weight
- Support and weight segment in 21-carat gold
- Number of jewels
- 38
- Power reserve
- 40 h
- Number of parts
- 343
specificities
- 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
Expert Service
As an Audemars Piguet owner, you’ll have access to the world’s brightest master horologers – many trained here in the Vallée de Joux.
ServiceVisit a Boutique
You can indulge your fascination with our timepieces at retail locations and at our exclusive boutiques, all over the world.
Where to buy
Audemars Piguet History
The perpetual calendar has a memory capable of mastering calendar irregularities through the year 2100.
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Royal Oak SELFWINDING
Selfwinding watch with date display and centre seconds.
