Audemars Piguet Royal Oak Royal Oak Perpetual Calendar Openworked
Reference 26685XT.OO.1320XT.01
About this watch
The Audemars Piguet Royal Oak Selfwinding Perpetual Calendar 26685XT.OO.1320XT.01 debuted in 2026 as part of the Royal Oak collection, introducing the openworked perpetual calendar Calibre 7139 in a titanium and Bulk Metallic Glass (BMG) case configuration.
The watch is housed in a 41 mm case crafted from titanium, with the bezel and caseback executed in BMG. Case thickness measures 9.5 mm. Sapphire crystals are fitted on both the dial side and case back. Water resistance is rated to 50 metres. The integrated bracelet is manufactured from titanium with BMG links and secured by a three-blade folding clasp.
The dial is executed in sapphire, revealing the movement architecture. It is combined with matching subdials featuring a smoked outer zone and a black inner bezel. The display includes indications for hours, minutes, week, day, date, month, leap year, and astronomical moon. Hands and hour markers are crafted from 18-carat pink gold and filled with luminescent material.
Powering the watch is the selfwinding Calibre 7139. The movement operates at a frequency of 28,800 vibrations per hour (4 Hz), consists of 423 components, and contains 41 jewels. It measures 29.6 mm in diameter, has a thickness of 4.1 mm, and provides a power reserve of approximately 55 hours.
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Specifications
- Brand
- Audemars Piguet
- Family
- Royal Oak
- Model
- Royal Oak Perpetual Calendar Openworked
- Reference
- 26685XT.OO.1320XT.01
- Movement
- ap-7139
- Movement Features
-
- Hours, Minutes
- Date, Day, Leap Year, Month, Week Indicator
- Moonphase
- Skeleton
- Case
- 41mm
- Dial Color
- Skeleton
- Crystal
- Sapphire
- Water Resistance
- 20
Current Listings
![[WTS] Audemars Piguet Royal Oak Offshore Limited Edition 26290RO.OO.A001VE.01 ♦️Lightly Used 2010♦️](https://preview.redd.it/ce4l9v6l5vzg1.jpg?width=640&crop=smart&auto=webp&s=7089c9d7900c389c2e004a51eb2695420917700d)
Audemars Piguet Royal Oak Offshore Limited Edition 26290RO.OO.A001VE.01 ♦️Lightly Used 2010♦️
A Limited Edition 2010 Audemars Piguet Royal Oak Offshore is for sale, complete with box and papers.
- Condition: Lightly Used
- Year Of Production: 2010
- Serial Number: none provided
- Set Included: Full set (box & papers)
![[WTS] Audemars Piguet Royal Oak 50th Anniversary, Silver Dial 15500ST.OO.1220ST.04 ♦️Lightly Used 2022♦️](https://preview.redd.it/9rd6pchffnzg1.jpg?width=640&crop=smart&auto=webp&s=92682cba02851001647487175b27c7a41618e167)
Audemars Piguet Royal Oak 50th Anniversary, Silver Dial 15500ST.OO.1220ST.04 ♦️Lightly Used 2022♦️
This is a 50th Anniversary Royal Oak model with a silver dial, dated Q4 2022 and comes with a full set including box and papers.
- Condition: Lightly Used
- Year: 2022
- Dial color: Silver
- Caliber: Calibre 65
![[WTS] [US] Audemars Piguet Royal Oak ‘Jumbo’ Blue Dial 39mm Stainless Steel - AP 15202st Full Set - $75,500](https://preview.redd.it/rsskdq35nbzg1.jpg?width=640&crop=smart&auto=webp&s=5df86a2bc6bc0cecaa3127a44e818fd96f90226d)
[US] Audemars Piguet Royal Oak ‘Jumbo’ Blue Dial 39mm Stainless Steel - AP 15202st Full Set - $75,500
This listing is for a stainless steel Audemars Piguet Royal Oak 'Jumbo' with a blue dial, measuring 39mm in diameter.
- Diameter: 39mm
![[WTS] MINT Audemars Piguet Royal Oak Offshore Diver Watch Only $16,900](https://preview.redd.it/i95jo9tzj6zg1.jpg?width=640&crop=smart&auto=webp&s=6dd71b4de5f6d7d5560fd6b8f36b369ed128b7d9)
MINT Audemars Piguet Royal Oak Offshore Diver Watch Only $16,900
2015-2021 J-series Royal Oak Offshore Diver with a black dial, running strong and in good working condition.
- Condition: MINT
- Case size: 42mm diameter
- Depth rating: 200m water resistance
Audemars Piguet Royal Oak Perpetual Calendar Blue White Ceramic MINT 26579CB
This Audemars Piguet Royal Oak Perpetual Calendar features a blue Grande Tapisserie dial, perpetual calendar function, and is made from white ceramic. It includes hours, minutes, day, date, month, moon phase, leap year, and week indicator functions.
- Condition: Mint
- Case material: White ceramic
- Dial color: Blue
Audemars Piguet Royal Oak 39mm White Dial - Mint Condition with Box
This Audemars Piguet Royal Oak features a white dial, iconic octagonal bezel, and signature Tapisserie pattern, making it a true masterpiece of luxury and precision.
- Condition: Mint Condition
- Box: Yes, original box included
- Shipping: Fully insured FedEx Priority Overnight shipping to US addresses included
- Payment Methods: Wire, cryptocurrency, credit card (+4%)
NIB Audemars Piguet Royal Oak Chronograph Rose Gold Green Dial Strap 26240 Full Se
This 41mm Audemars Piguet Royal Oak Chronograph features an in-house automatic movement and a green dial on an 18K rose gold case.
- Condition: New, unworn (NIB)
- Case size: 41mm
- Movement type: Automatic, in-house
Audemars PIGUET ROYAL OAK JUMBO ULTRA THIN 15202ST BLUE DIAL 2018 FULL SET
A 2018 Audemars Piguet Royal Oak Jumbo Extra-Thin in stainless steel with a blue dial, featuring a 39mm case size.
- Condition: Excellent Condition
- Case Size: 39mm
- Diameter: 39mm
- Year: 2018