- Year
- 2025
- Condition
- Unworn
- Set
- Box and papers
- Size
- 41 mm
- Edition
- Limited edition of 150 pieces.
Set and condition
Complete set
This Royal Oak Perpetual Calendar “150ᵀᴴ Anniversary” is accompanied by its original presentation box, warranty card and supporting documentation. The watch and included items are inspected by an expert watchmaker before sale. Additional photographs and video of this piece are available on request.
Original presentation box
Original presentation box and packaging.
Original papers
Warranty card and supporting documentation.
Inspected prior to sale
Reviewed for condition, completeness and functionality. Additional details and photographs are available on request.
Condition photography
Additional close-up images of specific areas are available before purchase.
Overview
Titanium, 41 mm
The Audemars Piguet Royal Oak Perpetual Calendar "150th Anniversary", reference 26585XT.OO.1220XT.01, in titanium with a BMG (Bulk Metallic Glass) bezel and caseback frame, 41 mm across. Selfwinding Calibre 5135, a perpetual calendar; limited edition of 150 pieces.
Audemars Piguet no longer makes this reference.
The Audemars Piguet Royal Oak Perpetual Calendar "150th Anniversary", reference 26585XT.OO.1220XT.01, is cased in a titanium case middle with a bezel and caseback frame in BMG (Bulk Metallic Glass) and a screw-locked crown, 41 mm across and 9.9 mm high. Water resistance is rated to 20 m. The dial is sapphire, with blue counter surrounds, a matching inner bezel, 18-carat white gold round hour-markers and blue bathtub hands filled with luminescent material. The bracelet is integrated, combining BMG studs with titanium links, on an AP folding clasp.
The movement is Calibre 5135, a selfwinding calibre giving a perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes. It is 29 mm across and 4.5 mm high, built from 374 parts holding 38 jewels, and runs at 2.75 Hz (19,800 vph) with a power reserve of 40 hours.
For collectors
This is a limited edition of 150 pieces, marking the case in a titanium middle with a bezel and caseback frame in BMG (Bulk Metallic Glass), and using Calibre 5135, which Audemars Piguet describes as this movement's final appearance in the Royal Oak Perpetual Calendar line.
Key details
Design and engineering
- CaseTitanium case middle with a bezel and caseback frame in BMG (Bulk Metallic Glass) and a screw-locked crown, 41 mm across and 9.9 mm high. Water resistance is rated to 20 m.
- DialSapphire, with blue counter surrounds, a matching inner bezel, 18-carat white gold round hour-markers and blue bathtub hands filled with luminescent material.
- BraceletIntegrated, combining BMG studs with titanium links, on an AP folding clasp.
Calibre 5135
- Selfwinding
- Perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes
- 29 mm across, 4.5 mm high; 374 parts, 38 jewels
- 2.75 Hz (19,800 vph)
- Power reserve 40 h
The reference
Technical specifications
| Reference | 26585XT.OO.1220XT.01 |
|---|---|
| Collection | Royal Oak |
| Calibre | Calibre 5135 |
| Functions | Perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes. |
| Case dimensions | 41 mm |
| Case material | Titanium |
| Bracelet | Titanium, AP folding clasp |
| Edition | Limited edition of 150 pieces. |
Buying with HYPA
Purchase with confidence
- Original warranty card included, dated 2025
- Free insured delivery within Australia and Hong Kong · elsewhere quoted
- Payment by bank transfer
- Registered Australian dealerHYPA International Pty Ltd · Registered Victorian second-hand dealer, Registration No. SHD-0018017.
- Direct specialist supportSpeak with the HYPA team before, during and after the purchase.
- Rated 5.0 on Google · 11 reviewsFrom clients of HYPA International on Google. Read the reviews
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