Audemars Piguet Royal Oak Royal Oak Ultra Thin Tourbillon Openworked Yellow Gold / Boutique Edition

Reference 26513BA.OO.1220BA.01

About this watch

The Audemars Piguet Royal Oak Ultra Thin Tourbillon Openworked Yellow Gold / Boutique Edition is a breathtaking blend of design, engineering, and exclusivity. Crafted from 18k yellow gold, this limited-edition masterpiece boasts a skeletonized dial that allows you to peer into the heart of the watch, revealing the intricate workings of the AP 2924 SQ caliber hand-wound movement. With a power reserve of 70 hours, this timepiece is not just a statement piece but also a testament to mechanical excellence. The tourbillon escapement compensates for gravitational errors in timekeeping, elevating the entire experience. This watch strikes the perfect balance between presence and wearability, making it suitable for everyday wear with a water resistance of 50 meters. As one of only 40 units produced, owning this piece is not just about having a watch but being part of a select group of collectors who appreciate the finer things in life.

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Key Features

18k yellow gold case
Skeletonized dial with intricate movement display
AP 2924 SQ caliber hand-wound movement
Tourbillon escapement for precision timekeeping
Water resistance up to 50 meters
Limited edition of only 40 units produced
Diameter: 41.00 mm, Height: 8.85 mm

Specifications

Brand

Audemars Piguet

Family

Royal Oak

Model

Royal Oak Ultra Thin Tourbillon Openworked Yellow Gold / Boutique Edition

Reference

26513BA.OO.1220BA.01

Movement

ap-2924-sq

Movement Features

Hours, Minutes
Tourbillon Escapement, Skeleton, Power Reserve Indicator

Case

Yellow Gold 41mm

Dial Color

Skeleton

Crystal

Sapphire

Water Resistance

Current Listings

2017 Audemars Piguet Royal Oak Offshore Diver 42MM White Dial Rubber Strap 15710ST.OO.A002CA.02

Audemars Piguet - 15710ST.OO.A002CA.02 · $194,900

This is a 2017 Audemars Piguet Royal Oak Offshore Diver in stainless steel with a white dial, on a rubber strap.

Condition: near-mint condition with almost zero wear
Case size: 42mm
Case material: stainless steel
Dial color: white

Posted at

Jan 9, 2026, 10:15 PM

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Audemars Piguet Royal Oak Offshore 43MM “Smoked Taupe” - Ref 26420SO.OO.A600CA.01 (EXCELLENT 2022 COMPLETE SET)

Audemars Piguet - 26420SO.OO.A600CA.01 · $31,650

A 43MM Audemars Piguet Royal Oak Offshore in smoked taupe, featuring a factory warranty intact until 2027 and included with outer box, inner box, manuals, and unworn strap.

Condition: Excellent pre-owned
Case size: 43mm diameter
Water resistance: 50m depth rating

Posted at

Jan 9, 2026, 5:09 PM

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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

The watch is a 44mm rose gold and black ceramic masterpiece from AP, featuring a smoked grey mega tapisserie dial, mechanical movement, and 100m water resistance.

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

Posted at

Jan 9, 2026, 8:10 AM

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Audemars Piguet Royal Oak Chronograph Yellow Gold Green Dial 41mm 26331BA.OO.1220BA.02

Audemars Piguet - 26331BA.OO.1220BA.02 · $195,000

This stunning Audemars Piguet Royal Oak Chronograph features a yellow gold case with a rich green dial, one of only 125 pieces ever made.

Condition: like new condition
Case diameter: 41mm
Case thickness: 11mm
Water resistance depth rating: 50m (5 ATM)

Posted at

Jan 9, 2026, 8:06 AM

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AP Royal Oak Offshore Diver 15706AU – Forged Carbon – 42mm – Watch Only – Good Condition – 19,500 Shipped – Trades Welcome

Audemars Piguet - 15706AU · $19,500

This is a Royal Oak Offshore Diver Ref. 15706AU, made of forged-carbon and featuring a black ceramic bezel and Méga Tapisserie dial.

Condition: Good condition with light carbon wear
Case material: Forged Carbon
Case size: 42mm diameter
Bezel type: Black ceramic bezel

Posted at

Jan 8, 2026, 3:28 PM

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[US] Audemars Piguet Royal Oak Offshore Chronograph 44mm Ceramic - 26405ce

Audemars Piguet - 26405CE · $59,900

a luxury watch listing for an Audemars Piguet Royal Oak Offshore Chronograph 44mm Ceramic model

Case material: ceramic
Size: 44mm diameter

Posted at

Jan 6, 2026, 3:31 PM

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

Audemars Piguet - 26238CD.OO.1300CD.01 · $129,995

The Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 is a brand-new 2025 release featuring a bold design, ceramic build, and in-house flyback chronograph movement.

Condition: like new
Case size: 42mm diameter
Case material: blue ceramic with titanium caseback
Bezel material: ceramic

Posted at

Jan 6, 2026, 8:59 AM

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1988 Seiko Quartz Chronograph “Royal Oak” Ref. 7A38-7280 | $315

Seiko - 7A38-7280 · $315

The Seiko Quartz Chronograph Ref. 7A38-7280 is a two-tone, angular watch inspired by the Royal Oak design, powered by the jewelled and fully serviceable caliber 7A38 quartz movement.

Condition: Good condition for its age with some markings on the case and bracelet
Movement Type: quartz
Jewels: 15

Posted at

Jan 5, 2026, 12:38 PM

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Seiko AP Royal Oak

Seiko · $199

a listing for a Seiko AP Royal Oak but this appears to be incorrect as there is no such model from Seiko, it is actually the Audemars Piguet Royal Oak which is not made by Seiko and the correct price and features are unknown. The seller claims it works as expected.

Condition: Working as it should
Payment methods: Venmo, PayPal

Posted at

Jan 4, 2026, 4:02 PM

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