Description
The titanium construction and 29mm proportions of this Royal Oak Perpetual Calendar create an unexpectedly refined presence on the wrist, where the sapphire dial reveals the intricate perpetual calendar mechanism beneath in crystalline clarity. Commemorating Audemars Piguet’s sesquicentennial milestone, this “150th Anniversary” edition bears the reference 26585XT.OO.1220XT.01 and represents a technical tour de force in ultra-thin horology at just 4.5mm movement thickness. The integrated bracelet’s innovative fusion of BMG (bulk metallic glass) studs with titanium links delivers both visual complexity and wearing comfort, while the comprehensive perpetual calendar displays track astronomical cycles through the transparent sapphire crystal dial.
Key Features & Specifications
150th Anniversary Sapphire Dial — Transparent crystal dial construction provides direct visibility of the perpetual calendar mechanism while commemorating Audemars Piguet’s founding in 1875
Ultra-Thin 4.5mm Calibre — Exceptional movement thinness enables elegant case proportions despite the complexity of perpetual calendar complications with 40-hour power reserve
Titanium Case Construction — Lightweight 29mm titanium case maintains the iconic Royal Oak octagonal silhouette while reducing overall wearing weight
BMG-Titanium Hybrid Bracelet — Integrated bracelet combines bulk metallic glass studs with titanium links, creating distinctive visual contrast and enhanced durability
Complete Perpetual Calendar Display — Full astronomical complications include week indication, day, date, moon phases, month, and leap year cycle tracking
2025 Unworn Condition — Latest production example delivered with complete box and papers documentation from authorized sources
AP Folding Clasp System — Signature Audemars Piguet deployment clasp with titanium construction and integrated safety mechanisms
Brand
Audemars Piguet
Model
Royal Oak Perpetual Calendar “150th Anniversary”
Reference Number
26585XT.OO.1220XT.01
Production Year
2025
Box/Papers
Box & Papers
Case Material
Titanium
Case Size
41 mm
Water Resistance
20 meters
Dial Type
Sapphire dial
Dial Details
Blue counter surrounds, matching inner bezel, 18-carat white gold round hour-markers, blue bathtub hands filled with luminescent material
Bracelet
Integrated bracelet combining BMG studs with titanium links
Clasp
AP folding clasp
Movement
Selfwinding
Caliber
5135
Functions
Perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours, and minutes
Number of Jewels
38
Power Reserve
40 hours
Total Diameter
29 mm
Number of Parts
374
Frequency
2.75 Hz (19,800 vph)
Movement Thickness
4.5 mm
Warranty
Two-year warranty
About This Timepiece
Bracelet Sizing — Complimentary bracelet sizing included with every purchase. Contact us with your wrist measurement and we’ll have it ready before shipping.
Authenticity Guarantee — Every watch is thoroughly inspected and authenticated by our team of certified horologists. 100% authentic, guaranteed.
Warranty — New model watches include a 1-year mechanical warranty covering manufacturing defects. All watches include our confidence guarantee.
Shipping — Free insured overnight FedEx shipping on all orders. Fully insured, signature required, discreet packaging.
Contact Us
Questions about this timepiece? Our specialists are available to help.
Phone/Text: (310) 363-0481
Email: sales@jestikcollection.com
Jestik Collection is an independent luxury watch dealer and is not affiliated with Rolex S.A., Rolex USA, Patek Philippe, Audemars Piguet, Cartier, Omega, Tudor, or any brands listed.
