- Year
- 2026
- Condition
- Unworn
- Set
- Box and papers
- Movement
- Selfwinding (automatic)
- Size
- 41 mm
Set and condition
Complete set
This Royal Oak Perpetual Calendar Ultra-Thin 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
18-carat yellow gold, 41 mm
The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin, reference 26586BA.OO.1240BA.99, in 18-carat yellow gold, 41 mm across, with a yellow gold-toned dial. Selfwinding Calibre 5133, giving a perpetual calendar with day, date, astronomical moon, month, leap year, night and day indication, hours and minutes.
Audemars Piguet no longer makes this reference.
The Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin, reference 26586BA.OO.1240BA.99, is cased in 18-carat yellow gold, 41 mm across and 6.2 mm high, with a glareproofed sapphire crystal and caseback. Water resistance is rated to 20 m. The dial is yellow gold-toned, with yellow gold-toned counters, and yellow gold hour-markers and Royal Oak hands with luminescent coating. The bracelet is 18-carat yellow gold, on an AP folding clasp.
The movement is Calibre 5133, a selfwinding calibre giving a perpetual calendar with day, date, astronomical moon, month, leap year, night and day indication, hours and minutes. It is 32 mm across and 2.9 mm high, built from 256 parts holding 37 jewels, and runs at 2.75 Hz (19,800 vph) with a power reserve of 40 hours.
Key details
Design and engineering
- Case18-carat yellow gold, 41 mm across and 6.2 mm high, with a glareproofed sapphire crystal and caseback. Water resistance is rated to 20 m.
- DialYellow gold-toned, with yellow gold-toned counters, and yellow gold hour-markers and Royal Oak hands with luminescent coating.
- Bracelet18-carat yellow gold, on an AP folding clasp.
Calibre 5133
- Selfwinding
- Perpetual calendar with day, date, astronomical moon, month, leap year, night and day indication, hours and minutes
- 32 mm across, 2.9 mm high; 256 parts, 37 jewels
- 2.75 Hz (19,800 vph)
- Power reserve 40 h
The reference
Technical specifications
| Reference | 26586BA.OO.1240BA.99 |
|---|---|
| Collection | Royal Oak |
| Calibre | Calibre 5133 |
| Movement | Selfwinding (automatic) |
| Functions | Perpetual calendar with day, date, astronomical moon, month, leap year, night and day indication, hours and minutes. |
| Case dimensions | 41 mm |
| Case material | 18-carat yellow gold |
| Dial | Yellow gold-toned dial |
| Bracelet | Yellow gold, 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 · 6 reviewsFrom clients of HYPA International on Google. Read the reviews
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