Audemars Piguet Royal Oak Royal Oak Perpetual Calendar Stainless Steel / Blue

Reference 25820ST.OO.0944ST.05

Audemars Piguet Royal Oak Perpetual Calendar Stainless Steel / Blue

About this watch

The Audemars Piguet Royal Oak Perpetual Calendar is a masterpiece of horology, blending tradition with modernity in a stunning stainless steel case paired with a striking blue dial. The 39 mm diameter strikes a perfect balance between boldness and elegance, while the tapisserie pattern on the dial catches the light beautifully. Crafted from high-quality stainless steel, this watch not only looks fantastic but is also built to last. The sapphire crystal glass adds to its robustness, providing scratch resistance and clarity. At the core lies the Audemars Piguet caliber AP 2120 / 2802, an engineering marvel designed for exceptional user experience. With an automatic mechanism, it harnesses energy from wrist movements, boasting a power reserve of approximately 40 hours. One standout feature is its perpetual calendar, adjusting for months of varying lengths and leap years, while the moonphase complication adds celestial beauty. The integrated bracelet is both visually appealing and ergonomic, ensuring a snug fit on the wrist. With manual finishing of the movement and stringent quality control, each piece is a work of art. This exclusivity makes it a coveted piece among collectors, elevating your watch game to new heights.
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MSRP: $40,500
Market Price: $109,775

Key Features

  • Audemars Piguet caliber AP 2120 / 2802 automatic movement
  • Perpetual calendar with leap year and month adjustment
  • Moonphase complication with Physical Vapor Deposited (PVD) metal on sapphire
  • Sapphire crystal glass for scratch resistance and clarity
  • 39 mm stainless steel case diameter
  • 9.30 mm height for comfortable wear
  • 20 meters water resistance for everyday use

Specifications

Brand
Audemars Piguet
Family
Royal Oak
Model
Royal Oak Perpetual Calendar Stainless Steel / Blue
Reference
25820ST.OO.0944ST.05
Movement
ap-2120-2802
Movement Features
  • Hours, Minutes
  • Date, Day, Leap Year, Month, Perpetual Calendar
  • Moonphase
Case
Stainless Steel 39mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
20

Current Listings

[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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[WTS] Audemars Piguet Royal Oak Offshore Chronograph 42mm Champagne Gold Dial 26470OR.OO.A002CR.01 "Half Brick”

Audemars Piguet Royal Oak Offshore Chronograph 42mm Champagne Gold Dial 26470OR.OO.A002CR.01 "Half Brick”

Audemars Piguet - 26470OR.OO.A002CR.01 · $31,950
This listing is for an Audemars Piguet Royal Oak Offshore Chronograph with a champagne gold dial, 42mm case size, and various other features. The watch is described as being in very good condition, with minor flaws noted. Additional details are available upon request.

  • Condition: Very good, with minor marks and wear
  • Material: Gold
Posted at
Feb 20, 2026, 10:38 AM
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[WTS] Audemars Piguet Royal Oak Offshore Selfwinding Chronograph Ceramic Rose Gold Grey Dial 44mm Box & Papers 26405NR.OO.A002CA.01

Audemars Piguet Royal Oak Offshore Selfwinding Chronograph Ceramic Rose Gold Grey Dial 44mm Box & Papers 26405NR.OO.A002CA.01

Audemars Piguet - 26405NR.OO.A002CA.01 · $47,495
This Audemars Piguet Royal Oak Offshore Selfwinding Chronograph Ceramic Rose Gold Grey Dial is a 44mm rose gold and black ceramic masterpiece with a smoked grey dial, featuring a chronograph, date, small seconds, and water resistance of 100m.

  • Condition: like new
  • Case size: 44mm diameter
  • Case material: ceramic
  • Bezel material: 18k rose gold
Posted at
Feb 20, 2026, 9:10 AM
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