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

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

Audemars Piguet - 56975ST · $21,800

1995 Audemars Piguet Royal Oak 120th Anniversary LE with a blue petite tapisserie dial and stainless steel bracelet.

Condition: Excellent, minimal wear
Case material: stainless steel
Diameter: 33mm diameter
Lug width: 23.5mm lug width

Posted at

May 3, 2026, 8:14 PM

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Audemars Piguet Royal Oak Offshore 15710ST.00.A002CA.02 Excellent Condition

Audemars Piguet - 15710ST.OO.A002CA.02 · $1,645

This is an Audemars Piguet Royal Oak Offshore Diver in excellent condition, running strong with healthy amplitude and accuracy.

Condition: Excellent pre-owned condition
Water resistance: 100m
Depth rating: 100m

Posted at

May 3, 2026, 2:01 PM

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Audemars Piguet Royal Oak Chronograph Blue Dial 26320ST

Audemars Piguet - 26320ST · $45,000

This Audemars Piguet Royal Oak Chronograph features a blue tapisserie dial and has a chronograph function along with a date window with quickset. It is powered by an automatic caliber 2385 movement with a 40 power reserve.

Condition: Very Good, minor signs of use on the case and minor patina/discoloration around the subdials
Movement type: Caliber 2385 automatic movement
Power reserve: 40 hours
Water resistance depth: 50m

Posted at

May 1, 2026, 12:57 PM

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Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 Beige Dial 43mm 26420CD.OO.A029VE.01

Audemars Piguet - 26420CD.OO.A029VE.01 · $86,995

The Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 features a beige dial with blue sub-dials and a matching blue ceramic bezel, contrasting the bold Offshore silhouette. The watch is powered by the integrated Calibre 4401 movement, offering a flyback function and a full view through the sapphire caseback.

Condition: Brand new
Case Size: 43mm diameter
Movement Caliber: Calibre 4401
Power Reserve: 70 hours

Posted at

May 1, 2026, 8:35 AM

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Audemars Piguet Royal Oak Offshore Diver Stainless Steel Grey Dial 42mm 15720ST.OO.A009CA.01

Audemars Piguet - 15720ST.OO.A009CA.01 · $25,395

The Audemars Piguet Royal Oak Offshore Diver is a rugged evolution of the Royal Oak DNA, built for 300m depth without breaking a sweat.

Condition: excellent
Case Size: 42mm
Depth Rating: 300m
Movement Caliber: 4308

Posted at

May 1, 2026, 8:34 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 · $42,495

This is a 44mm rose gold and black ceramic Audemars Piguet Royal Oak Offshore Selfwinding Chronograph, featuring a smoked grey dial.

Condition: like new condition
Case Size: 44mm diameter
Water Resistance: 100m (10ATM)
Movement Caliber: 3126/3840

Posted at

May 1, 2026, 7:55 AM

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Audemars Piguet Royal Oak Offshore Diver – White Dial Navy Accents – Ref. 15710ST.OO.A010CA.01

Audemars Piguet - 15710ST.OO.A010CA.01 · $19,198

The Audemars Piguet Royal Oak Offshore Diver features a 42mm stainless steel case with a white dial and blue accents, combining high-end watchmaking with professional dive capability.

Condition: Like new - recently serviced
Case size: 42mm diameter
Case material: stainless steel
Dial color: white

Posted at

Apr 30, 2026, 8:50 PM

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AUDEMARS PIGUET Royal Oak Offshore Perpetual Calendar Black Rose Gold 26209OR.OO.D101CR.01

AUDEMARS PIGUET - 26209OR.OO.D101CR.01 · $89,900

The Audemars Piguet Royal Oak Offshore Perpetual Calendar reference 26209OR is a highly sophisticated interpretation of the Offshore line, combining bold proportions with a full perpetual calendar complication.

Condition: Excellent condition
Production Run: 25 pieces
Warranty Valid Until: January 2027

Posted at

Apr 30, 2026, 1:35 PM

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