Audemars Piguet Royal Oak Royal Oak Ultra Thin Tourbillon Openworked Stainless Steel

Reference 26518ST.OO.1220ST.01

Audemars Piguet Royal Oak Ultra Thin Tourbillon Openworked Stainless Steel

About this watch

The Audemars Piguet Royal Oak Ultra Thin Tourbillon Openworked is a masterpiece of horology that embodies the pinnacle of luxury watchmaking. This stunning timepiece boasts an open-worked movement, showcasing the intricate beauty of its hand-wound caliber AP 2924 SQ. With a tourbillon escapement and a power reserve of up to 70 hours, this watch is not only a work of art but also a marvel of engineering. Its stainless steel case measures 41mm in diameter and 8.95mm in height, offering a sleek profile that sits comfortably on the wrist. The integrated bracelet design adds to its comfort and style, while the sapphire glass provides scratch-resistance and sophistication. As a limited edition of just 100 units, this watch is truly exclusive, making it a coveted piece for collectors and watch enthusiasts alike. Whether you're looking to make a statement or simply appreciate fine craftsmanship, the Royal Oak Ultra Thin Tourbillon Openworked is sure to impress.

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Key Features

Hand-wound movement with tourbillon escapement
Open-worked dial revealing intricate mechanism
Stainless steel case with 41mm diameter and 8.95mm height
Integrated bracelet design for comfort and style
Sapphire glass for scratch-resistance and sophistication
Limited edition of 100 units
Power reserve up to 70 hours

Specifications

Brand

Audemars Piguet

Family

Royal Oak

Model

Royal Oak Ultra Thin Tourbillon Openworked Stainless Steel

Reference

26518ST.OO.1220ST.01

Movement

ap-2924-sq

Movement Features

Hours, Minutes
Tourbillon Escapement, Skeleton, Power Reserve Indicator

Case

Stainless Steel 41mm

Dial Color

Skeleton

Crystal

Sapphire

Water Resistance

Current Listings

Audemars Piguet Royal Oak Offshore 26170ST.OO.D091CR.01

Audemars Piguet - 26170ST.OO.D091CR.01 · $18,699

A classic Royal Oak Offshore reference with a 42mm stainless steel case and iconic octagonal bezel. The watch features an automatic chronograph movement, date display at 3 o'clock, and comes complete with the original box and papers.

Condition: Excellent, light signs of careful wear
Case size: 42mm diameter
Movement type: Automatic chronograph

Posted at

Jan 17, 2026, 8:23 PM

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[US] Audemars Piguet Royal Oak Chronograph 39mm Panda Silver Dial - AP 26300ST Full Set

Audemars Piguet - 26300ST

Audemars Piguet Royal Oak Chronograph with a 39mm panda silver dial.

Condition: Full Set
Diameter: 39mm

Posted at

Jan 16, 2026, 4:55 PM

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AP Royal Oak Offshore Box & Papers Great Condition 26420TI.OO.A027CA.01

Audemars Piguet - 26420TI.OO.A027CA.01 · $27,900

This is the stunning Titanium 43mm model with the blue dial and matching rubber strap — lightweight, sporty, and incredibly comfortable on the wrist.

Condition: Excellent overall
Case material: Titanium
Diameter: 43mm
Straps included: Blue rubber strap

Posted at

Jan 16, 2026, 3:49 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

This is a strong and beautiful rose gold and black ceramic Audemars Piguet Royal Oak Offshore Selfwinding Chronograph with a 44mm case size, smoked grey dial, and features like chronograph and date.

Condition: like new
Case size: 44mm diameter
Water resistance: 100m (10ATM) depth rating
Movement caliber: 3126/3840

Posted at

Jan 16, 2026, 8:10 AM

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1988 Seiko Quartz Chronograph “Royal Oak” Ref. 7A38-7280 | $305

Seiko - 7A38-7280 · $305

The watch is a two-tone, angular, Royal Oak-inspired chrono powered by one of the best quartz movements ever made. It has a slim, sharp design that's more refined than most people would expect from a Seiko. The 7A38-7280 is pure 80s Seiko flex with real horology behind it.

Condition: Good condition for its age with some markings on the case and bracelet, mineral crystal in good shape
Case Size: 37.3 x 41.5mm
Movement Type: quartz
Jewels: 15

Posted at

Jan 15, 2026, 5:15 PM

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2021 Audemars Piguet Royal Oak Offshore Chrono "The Beast" 42mm 26238ST Blue Dial - $36,900

Audemars Piguet - 26238ST.OO.2000ST.01 · $36,900

2021 Audemars Piguet Royal Oak Offshore Chronograph 42mm with a blue dial and stainless steel case.

Box: true
Papers: true
Manual: true

Posted at

Jan 15, 2026, 3:27 PM

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Audemars Piguet Royal Oak Offshore "Vampire" 26470ST - Mint

Audemars Piguet - 26470ST.OO.A101CR.01 · $20,895

The watch is an Audemars Piguet Royal Oak Offshore with a black Méga Tapisserie dial and blood-red chronograph accents, powered by the Calibre 3126/3840 self-winding movement.

Condition: Excellent
Movement: Calibre 3126/3840 self-winding (automatic)
Functions: chronograph, date, hours/minutes/seconds, small seconds
Power reserve: 50 hours

Posted at

Jan 13, 2026, 11:21 AM

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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 · $123,995

This Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 features a bold design, ceramic build, and in-house flyback chronograph movement. The 42 mm case delivers classic power in a modern form.

Condition: like new
Case size: 42 mm
Movement caliber: Calibre 4404
Power reserve: 70 hours

Posted at

Jan 13, 2026, 8:25 AM

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