Audemars Piguet Royal Oak Royal Oak Perpetual Calendar Openworked 41 150th Anniversary

Reference 26585XT.OO.1220XT.01

Audemars Piguet Royal Oak Perpetual Calendar Openworked 41 150th Anniversary

About this watch

The Royal Oak Perpetual Calendar Openworked ref. 26585XT.OO.1220XT.01 debuted in 2025, marking 150th anniversary of Audemars Piguet, and the end of of caliber AP 5135 - which is dressed-up for the occasion, The 41 mm case combines a bezel and caseback frame in BMG (Bulk Metallic Glass) with a titanium case middle and screw-locked crown.
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Specifications

Brand
Audemars Piguet
Family
Royal Oak
Model
Royal Oak Perpetual Calendar Openworked 41 150th Anniversary
Reference
26585XT.OO.1220XT.01
Movement
ap-5135
Movement Features
  • Hours, Minutes
  • Date, Day, Leap Year, Month, Week Indicator
  • Moonphase
Case
41mm
Dial Color
Skeleton
Crystal
Sapphire
Water Resistance
20

Current Listings

[WTS] AP Royal Oak Offshore 1000 series SS bracelet UK

AP Royal Oak Offshore 1000 series SS bracelet UK

Audemars Piguet - 1000 series
The seller is listing an Audemars Piguet Royal Oak Offshore 1000 series stainless steel bracelet watch, likely from a reputable source.

  • Uk only: seller's preferred location for sale and shipping
  • Meets included: includes original paperwork or accessories
Posted at
May 13, 2026, 8:54 AM
Active
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[WTS] MINT Audemars Piguet Royal Oak Offshore Diver 15710ST 42mm

MINT Audemars Piguet Royal Oak Offshore Diver 15710ST 42mm

Audemars Piguet - 15710ST · $16,900
2015-2021 stainless steel Royal Oak Offshore Diver with a black dial, running strong and all functions working as they should.

  • Condition: MINT
  • Case size: 42mm diameter
  • Dial color: black
Posted at
May 12, 2026, 12:38 PM
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[WTS] 2012 Audemars Piguet Royal Oak Offshore 26400AU.OO.A002CA.01

2012 Audemars Piguet Royal Oak Offshore 26400AU.OO.A002CA.01

Audemars Piguet - 26400AU.OO.A002CA.01
Posted at
May 11, 2026, 10:19 PM
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[WTS] Audemars Piguet Royal Oak Offshore Limited Edition 26290RO.OO.A001VE.01 ♦️Lightly Used 2010♦️

Audemars Piguet Royal Oak Offshore Limited Edition 26290RO.OO.A001VE.01 ♦️Lightly Used 2010♦️

Audemars Piguet - 26290RO.OO.A001VE.01 · $36,200
This Audemars Piguet Royal Oak Offshore Limited Edition is a lightly used model from Q4 2010, featuring the Calibre 65 movement and coming with its full set of box and papers.

  • Condition: Lightly Used
  • Year: 2010
  • Case size: 40mm diameter
  • Calibre: Calibre 65
Posted at
May 11, 2026, 4:49 AM
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[WTS] Audermars Piguet Royal Oak Offshore “Safari” 26170ST.OO.D091CR.01 42mm Stainless Steel Full Set w/ Both Straps

Audermars Piguet Royal Oak Offshore “Safari” 26170ST.OO.D091CR.01 42mm Stainless Steel Full Set w/ Both Straps

Audemars Piguet - 26170ST.OO.D091CR.01 · $19,850
A highly collectible 'Safari' edition from the Royal Oak Offshore line, featuring a rugged stainless steel case and a warm ivory dial.

  • Condition: Excellent Pre-owned condition
  • Case size: 42mm diameter
  • Year of production: 2008
  • Movement: AP's In-House Calibre 3120 Automatic Self Winding Chronograph
Posted at
May 11, 2026, 12:06 AM
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[WTS] Audemars Piguet Royal Oak Chronograph Blue Dial 26320ST

Audemars Piguet Royal Oak Chronograph Blue Dial 26320ST

Audemars Piguet - 26320ST · $45,000
This is a blue dial Royal Oak Chronograph with a 41mm x 11mm case and a 52mm lug to lug. It features an automatic movement, chronograph function, date window with quickset, sapphire crystal, and 50M water resistance.

  • Condition: Very Good (VG), minor signs of use on the case, minor patina/discoloration around the subdials
  • Case dimensions: 41mm x 11mm
  • Lug to lug: 52mm
  • Movement: Caliber 2385 automatic movement, 40 power reserve
Posted at
May 9, 2026, 3:03 PM
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[WTS] Audemars Piguet Royal Oak Offshore Bleu Nuit Nuage 50 Beige Dial 43mm 26420CD.OO.A029VE.01

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

Audemars Piguet - 26420CD.OO.A029VE.01 · $86,995
This watch features a beige dial with blue sub-dials and ceramic bezel, set against the bold Offshore silhouette.

  • Condition: Brand new
  • Case size: 43mm
  • Dial color: beige
  • Movement caliber: Calibre 4401
Posted at
May 9, 2026, 8:18 AM
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[WTS] Audemars Piguet Royal Oak Offshore Diver Stainless Steel Grey Dial 42mm 15720ST.OO.A009CA.01

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 of depth without breaking a sweat. It features a grey 'Méga Tapisserie' dial and an in-house Calibre 4308 visible through the sapphire caseback.

  • Condition: Excellent
  • Case size: 42mm diameter
  • Water resistance: 300m (30 ATM)
  • Movement caliber: 4308
Posted at
May 9, 2026, 8:17 AM
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Audemars Piguet Royal Oak Perpetual Calendar Blue White Ceramic MINT 26579CB

Audemars Piguet Royal Oak Perpetual Calendar Blue White Ceramic MINT 26579CB

Audemars Piguet - 26579CB · $306,899
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
Posted at
Apr 8, 2025, 1:20 PM
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