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

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

Current Listings

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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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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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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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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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 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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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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[US] Audemars Piguet Royal Oak ‘Jumbo’ Blue Dial 39mm Stainless Steel 15202st - $63,500

Audemars Piguet - Royal Oak 'Jumbo' Blue Dial 39mm Stainless Steel 15202st · $63,500

This listing is for a used Audemars Piguet Royal Oak 'Jumbo' with a blue dial, made of stainless steel. The watch features a 39mm case size.

Posted at

Feb 19, 2026, 2:37 PM

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Audemars Piguet Royal Oak Offshore 15710ST Complete Set w/Box and Papers

Audemars Piguet - 15710ST · $16,995

This Audemars Piguet Royal Oak Offshore is a stainless steel watch with a white Mega Tapisserie dial and iconic octagonal bezel. It features an automatic Caliber 3120 movement, approximately 60-hour power reserve, and 300m water resistance.

Condition: Excellent Pre-Owned Condition
Case material: stainless steel
Dial type: white Mega Tapisserie
Bezel material: stainless steel with exposed hexagonal screws

Posted at

Feb 18, 2026, 3:52 PM

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