- Year
- 2026
- Condition
- Unworn
- Set
- Box and papers
- Movement
- Selfwinding (automatic)
- Size
- 41 mm
Set and condition
Complete set
This Royal Oak Selfwinding Chronograph 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
Stainless steel, 41 mm
The Audemars Piguet Royal Oak Selfwinding Chronograph, reference 26240ST.OO.1320ST.05, in stainless steel, 41 mm across, with a “Bleu Nuit, Nuage 50” dial. Selfwinding Calibre 4401, a flyback chronograph with hours, minutes, small seconds and date.
The Audemars Piguet Royal Oak Selfwinding Chronograph, reference 26240ST.OO.1320ST.05, is cased in stainless steel, 41 mm across and 12.4 mm high, with a screw-locked crown and a glareproofed sapphire crystal and caseback. Water resistance is rated to 50 m. The dial is “Bleu Nuit, Nuage 50”, with the “Grande Tapisserie” pattern, matching counters, white gold applied hour-markers and Royal Oak hands with luminescent coating. The bracelet is stainless steel, on an AP folding clasp.
The movement is Calibre 4401, a selfwinding calibre giving a flyback chronograph, hours, minutes, small seconds and date. It is 32 mm across and 6.8 mm high, built from 381 parts holding 40 jewels, and runs at 4 Hz (28,800 vph) with a power reserve of 70 hours.
Key details
Design and engineering
- CaseStainless steel, 41 mm across and 12.4 mm high, with a screw-locked crown and a glareproofed sapphire crystal and caseback. Water resistance is rated to 50 m.
- Dial“Bleu Nuit, Nuage 50”, with the “Grande Tapisserie” pattern, matching counters, white gold applied hour-markers and Royal Oak hands with luminescent coating.
- BraceletStainless steel, on an AP folding clasp.
Calibre 4401
- Selfwinding
- Flyback chronograph, hours, minutes, small seconds and date
- 32 mm across, 6.8 mm high; 381 parts, 40 jewels
- 4 Hz (28,800 vph)
- Power reserve 70 h
The reference
Technical specifications
| Reference | 26240ST.OO.1320ST.05 |
|---|---|
| Collection | Royal Oak |
| Calibre | Calibre 4401 |
| Movement | Selfwinding (automatic) |
| Functions | Flyback chronograph, hours, minutes, small seconds and date. |
| Case dimensions | 41 mm |
| Case material | Stainless steel |
| Bracelet | Stainless steel, AP folding clasp |
Buying with HYPA
Purchase with confidence
- Original warranty card included, dated 2026
- 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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