Audemars Piguet Royal Oak Royal Oak Perpetual Calendar Openworked Yellow Gold

Reference 25829BA.OO.0944BA.01

Audemars Piguet Royal Oak Perpetual Calendar Openworked Yellow Gold
Audemars Piguet Royal Oak Perpetual Calendar Openworked Yellow Gold
Audemars Piguet Royal Oak Perpetual Calendar Openworked Yellow Gold
Audemars Piguet Royal Oak Perpetual Calendar Openworked Yellow Gold

About this watch

The Audemars Piguet Royal Oak Perpetual Calendar Openworked Yellow Gold is a masterpiece of luxury watchmaking, boasting an exquisite design, intricate mechanics, and luxurious materials. This stunning timepiece tells a story through its openworked dial, showcasing the AP 2120 / 2802 caliber's reliability and precision. The perpetual calendar automatically accounts for varying month lengths and leap years, while the moonphase indicator adds celestial charm. Meticulous craftsmanship is evident in the manual finishing of bridges, including polished bevels and satin-brushed edges. The open case back offers a captivating view of the movement's inner workings, featuring an oscillating weight beautifully engraved and decorated. With its 39mm diameter, 9.30mm height, and water resistance of 20 meters, this watch strikes a perfect balance between substance and comfort. It's a statement of luxury and an heirloom that can be passed down through generations.
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Key Features

  • Audemars Piguet caliber AP 2120 / 2802 movement
  • Perpetual calendar with automatic date adjustment
  • Moonphase indicator with Physical Vapor Deposited metal on sapphire
  • Yellow gold case with polished and satin-brushed finishes
  • Openworked dial with Feuille hands
  • Water resistance of 20 meters
  • Sapphire crystal glass

Specifications

Brand
Audemars Piguet
Family
Royal Oak
Model
Royal Oak Perpetual Calendar Openworked Yellow Gold
Reference
25829BA.OO.0944BA.01
Movement
ap-2120-2802
Movement Features
  • Hours, Minutes
  • Date, Day, Leap Year, Month, Perpetual Calendar
  • Moonphase
Case
Yellow Gold 39mm
Dial Color
See-through
Crystal
Sapphire
Water Resistance
20

Current Listings

[WTS] Audemars Piguet Royal Oak Offshore "Elephant" | Gray Dial Ref. 26470ST.OO.A104CR.01 | 42mm | Stainless Steel | Full Set | 2014

Audemars Piguet Royal Oak Offshore "Elephant" | Gray Dial Ref. 26470ST.OO.A104CR.01 | 42mm | Stainless Steel | Full Set | 2014

Audemars Piguet - 26470ST.OO.A104CR.01 · $21,540
The Audemars Piguet Royal Oak Offshore 'Elephant' is a 42mm stainless steel watch with a slate gray dial and black chronograph pushers. It features an automatic movement with 50 hours of power reserve.

  • Condition: 8/10 Condition, light handling marks consistent with its age and careful wear
  • Diameter: 42mm
  • Case material: stainless steel
  • Movement power reserve: 50 hours
Posted at
Feb 25, 2026, 10:08 PM
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[WTS] 2024 Audemars Piguet Royal Oak Chronograph 26240CE — Brand New Condition, Box & Papers

2024 Audemars Piguet Royal Oak Chronograph 26240CE — Brand New Condition, Box & Papers

Audemars Piguet - 26240CE · $112,000
The Audemars Piguet Royal Oak Chronograph 26240CE is a bold yet refined watch featuring the iconic Royal Oak design executed in full black ceramic, with an in-house flyback chronograph movement and integrated bracelet.

  • Condition: Brand new condition
  • Size: 41mm diameter
  • Lug To Lug: 51.4mm
  • Thickness: 12.4mm
Posted at
Feb 25, 2026, 8:12 AM
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[WTS] 2017 Audemars Piguet Royal Oak Rhodium/Grey - 15400ST.OO.1220ST.04 - Box/Archive Papers

2017 Audemars Piguet Royal Oak Rhodium/Grey - 15400ST.OO.1220ST.04 - Box/Archive Papers

Audemars Piguet - 15400ST.OO.1220ST.04 · $36,500
The Royal Oak 15400ST features a 41mm case with an octagonal shaped bezel, rhodium or metallic grey dial, and Calibre 3120 movement.

  • Condition: Very excellent preowned condition with little to no signs of wear throughout
  • Case size: 41mm
  • Bracelet length: fits approx 7.75in wrist
Posted at
Feb 25, 2026, 1:15 AM
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[WTS] Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 26238CD.OO.1300CD.01 Complete Set

Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 26238CD.OO.1300CD.01 Complete Set

Audemars Piguet - 26238CD.OO.1300CD.01 · $120,995
The Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 is a brand-new 2025 release with an in-house flyback chronograph movement, 42mm blue ceramic case, and 70-hour power reserve.

  • Condition: like new
  • Movement: Mechanical (Automatic) Calibre 4404
  • Case Size: 42 mm diameter
  • Case Thickness: 15.3 mm
Posted at
Feb 24, 2026, 8:42 AM
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[WTS] Seiko Sports 150 Arlam Chronograph Ref. 7T34-7A10 “Royal Oak” — $550 Shipped

Seiko Sports 150 Arlam Chronograph Ref. 7T34-7A10 “Royal Oak” — $550 Shipped

Seiko - 7T34-7A10 · $550
Up for sale is a Seiko chronograph alarm, often nicknamed the “**Seiko Royal Oak**” thanks to its integrated bracelet and octagonal bezel design.

  • Condition: Honest signs of wear consistent with age
  • Movement: Seiko 7T34 quartz chronograph (alarm function)
  • Case size: 41mm x 43mm x 10mm
  • Bracelet type: Integrated stainless steel bracelet
Posted at
Feb 24, 2026, 2:24 AM
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[WTS] 1983 Seiko Quartz Chronograph “Royal Oak” Ref. 7A38-7020 | $600

1983 Seiko Quartz Chronograph “Royal Oak” Ref. 7A38-7020 | $600

Seiko - 7A38-7020 · $600
The Seiko Quartz Chronograph 'Royal Oak' Ref. 7A38-7020 is a rare and highly sought-after timepiece from the 80s, featuring a gray dial with black subdials and a 12-sided bezel.

  • Condition: Good condition for its age, with some markings on the case and bracelet, mineral crystal scratches.
  • Case Size: 38.5 x 42.5mm stainless steel case with a thickness of 11.2mm
  • Movement Type: quartz with 15 jewels
  • Movement Complications: analog quartz chronograph, day/date complication
Posted at
Feb 23, 2026, 5:34 PM
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[WTS] 1995 Audemars Piguet Royal Oak 120th Anniversary LE ref. 56975ST w/ Box & Extract

1995 Audemars Piguet Royal Oak 120th Anniversary LE ref. 56975ST w/ Box & Extract

Audemars Piguet - 56975ST · $23,300
A 1995 Audemars Piguet Royal Oak 120th Anniversary LE with blue petite tapisserie dial and stainless steel case.

  • Condition: Very clean, minimal wear
  • Case material: Stainless steel
  • Diameter: 33 mm (case diameter)
  • Lug width: 23.5 mm
Posted at
Feb 22, 2026, 7:06 PM
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[WTS] Vintage Seiko Sports 150 – Alarm Chronograph – 😏 “Poor Man’s AP Royal Oak” 😏 – 7T34-7A10 – $245 Shipped

Vintage Seiko Sports 150 – Alarm Chronograph – 😏 “Poor Man’s AP Royal Oak” 😏 – 7T34-7A10 – $245 Shipped

Seiko - 7T34-7A10 · $245
This vintage Seiko Sports 150 is a quartz-powered chronograph with date display and alarm functions, housed in an approximately 44mm case.

  • Condition: Poor condition with signs of wear and fading
  • Case size: approximately 44mm diameter
  • Bracelet length supported: up to 8 inches
Posted at
Feb 21, 2026, 5:38 PM
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Audemars Piguet Royal Oak Perpetual Calendar Blue White Ceramic MINT 26579CB

Audemars Piguet Royal Oak Perpetual Calendar Blue White Ceramic MINT 26579CB

Audemars Piguet - 26579CB · $306,899
This Audemars Piguet Royal Oak Perpetual Calendar features a blue Grande Tapisserie dial, perpetual calendar function, and is made from white ceramic. It includes hours, minutes, day, date, month, moon phase, leap year, and week indicator functions.

  • Condition: Mint
  • Case material: White ceramic
  • Dial color: Blue
Posted at
Apr 8, 2025, 1:20 PM
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