Royal Oak Selfwinding Chronograph
26240ST.OO.1320ST.05Size 41 mm50 m70 h€32,800launch price
Calendar, 2026
Royal Oak Perpetual Calendar Openworked
Ref. 26685XT.OO.1320XT.01
- 41mm
- Size
- 9.5mm
- Thickness
- 55h
- Power reserve
- 50m
- Water resistance
A perpetual calendar on view thanks to a sapphire disc and a calibre of only 4.1 mm. All settings on calibre 7139 are made from the crown, according to Fratello.
Price not verified yet
We only publish a price with a source and a date.
- Size
- 41 mm
- Thickness
- 9.5 mm
- Power reserve
- 55 h
- Water resistance
- 50 m
- Movement
- Automatic
- Material
- titanium and Bulk Metallic Glass
Specifications
Case
- Size
- 41 mm
- Thickness
- 9.5 mm
- Material
- titanium and Bulk Metallic Glass
- Shape
- octagonal
- Water resistance
- 50 m
Movement
- Movement
- Automatic
- Calibre
- 7139
- Power reserve
- 55 h
- Frequency
- 28,800 vph
- Jewels
- 41
- Complications
- hours, minutes, day of the week, date, week, month, leap year, moon phase, perpetual calendar
Dial and strap
- Dial
- openworked sapphire
- Markers
- batons
- Date
- Yes
- Bezel
- octagonal, Bulk Metallic Glass
- Strap
- bracelet, titanium
Record
- Line
- Royal Oak
- Year
- 2026
- Status
- In production
- Range
- Haute horlogerie
Across the Archive
Alternatives
Royal Oak Selfwinding
15510ST.OO.1320ST.06Size 41 mm50 m70 hJP¥4,400,000
Royal Oak
5402STSize 39 mm40 hNo price yet
Why it matters
- Calibre 7139 with 423 components
- 9.5 mm case
- Astronomical moon phase
Sources
Record confidence: medium. Anything unverified stays marked, never estimated.