Audemars Piguet has launched a new iteration of its 41 mm Royal Oak Selfwinding Perpetual Calendar Ultra-Thin model. Limited to 200 pieces, this new model is the heir to the RD#2 model launched in 2019, and to the developments that the Manufacture has been pursuing for several years in terms of ultra-thin calibres.

Dressed in a titanium case and featuring a smoky blue dial with three black counters, this new version combines aesthetic sophistication with a cutting-edge astronomical complication.

This new edition features titanium on the case, bracelet and bezel, while also incorporating the alternating finishes dear to Audemars Piguet. The screws and chamfers of the bezel, case and bracelet links are polished, while the other surfaces are adorned with a vertical satin-brushed finish.

This reference introduces a new smoky-blue dial developed especially for the model. Light in the centre and black around the rim, the sunburst motif dial with luminous aesthetics facilitates read-off of the calendar indications, month and leap year at 3 o’clock, date at 6 o’clock, day and day/night indicator at 9 o’clock.

Each of these items of information appears in a snailed black counter. The moon phase at 12 o’clock is the only indication whose design has not been modified. The dial remains punctuated by 12 luminescent applied hour-markers and two central hands, likewise luminescent.

On the caseback side, this new Royal Oak Selfwinding Perpetual Calendar Ultra-Thin features a sapphire crystal offering view of the perpetual calendar movement measuring just 2.89 mm thick.

Audemars Piguet Calibre 5133

Elegantly combining robustness and reliability, the Calibre 5133 comprises 256 parts within a space measuring just 2.9 mm thick and 32 mm in diameter. This automatic movement operates at a frequency of 2.75 Hz (19,800 vph) and delivers a power reserve of at least 40 hours.

Inside, the perpetual calendar functions usually placed on three separate levels are positioned on a single plane. This new technical feat led to the development of two patented innovations: the integration of the end-of-month cam with the date wheel and the association of the month cam with the month wheel. To further reduce thickness, the dial also acts as a bridge.

These major advances have been achieved through a combination of CNC (Computer Numerical Control) and CAD (Computer Aided Design) technologies used by the Manufacture since the 1980s.

Technical details

Model: Royal Oak Selfwinding Perpetual Calendar Ultra-Thin 41 mm
26586TI.OO.1240TI. 01

Functions
Perpetual calendar with day, date, month, astronomical moon, leap year and day/night indications, hours and minutes

Case
Satin-brushed titanium case
Glare-proofed sapphire crystal and caseback
Titanium screw-lock crown
Water-resistant to 20 m
Box thickness: 6.2 mm

Movement
Self-winding Calibre 5133
Total diameter: 32 mm (14 ¼ lignes)
Total thickness: 2.9 mm
Number of parts: 256
Number of jewels: 37
Minimum power reserve guaranteed: 40 h
Frequency of balance wheel: 2.75 Hz (19,800 vibrations/hour)

Dial
Smoky-blue dial with sunburst pattern, black counters, applied hour-markers and Royal Oak hands in white gold with luminescent coating.

Bracelet
Satin-brushed titanium bracelet with titanium AP folding clasp