Audemars Piguet Royal Oak Selfwinding Chronograph 41mm “One Drop” Unique Piece

Audemars Piguet has a dedicated unique timepiece to an exclusive auction during the La Cuvée One Drop 2022 philanthropic event in Las Vegas, Nevada. The unique 41 mm AP Royal Oak Selfwinding Chronograph One Drop contrasts black ceramic with a deep blue dial adorned with a vertical satin-finished design.

Featuring a flyback chronograph, hours, minutes, small seconds and a date, this one-of-a-kind timepiece was inspired by the AP Black Ceramic Royal Oak Selfwinding Chronograph 41mm, unveiled in celebration of the 50th anniversary of the Royal Oak collection earlier this year.

The timepiece’s 41 mm case, push-pieces, screw-locked crown and integrated bracelet, all crafted from black ceramic, are enhanced with white gold screws on the bezel which create a striking visual contrast.

Audemars Piguet Royal Oak Selfwinding Chronograph 41mm “One Drop” Unique Piece

Replacing the signature Tapisserie guilloché dial, this timepiece comes with a deep blue dial showcasing a bold vertical satin-finished design and corresponding blue snailed counters. The blackened gold applied hour-markers, Audemars Piguet signature and Royal Oak hands, recall the watch’s black ceramic architecture, while a luminescent coating on the hour-markers and hands illuminates the dial in low light.

The small seconds counter at 6 o’clock is the same size as the minute and hour counters at 3 and 9 o’clock, in comparison to earlier references (26331) where this counter was slightly smaller. Another new detail to note is the shape of the chronograph’s second hand which features a trapezoid counterweight.

Net proceeds from La Cuvée One Drop 2022 auction will go towards the critical mission of the One Drop Foundation to ensure sustainable access to safe water for all, improving the health and well-being of the world’s most vulnerable communities.


The AP Royal Oak  One Drop” Selfwinding Chronograph houses the Manufacture’s integrated flyblack chronograph Calibre 4401. This movement has 381 parts and it offers a power reserve of 70 hours.

The watch is endowed with a titanium sapphire caseback that reveals the refined Haute Horlogerie decorations on the movement, such as Côtes de Genève, circular graining and circular satin and polished chamfers throughout. A blackened 22-carat gold oscillating weight is also visible through the caseback, along with the engraving “Unique Piece”.

Technical details

Model: Audemars Piguet Royal Oak Selfwinding Chronograph “One Drop” 41 mm
Reference 26240CE.OO.1225CE.98

Self-winding Manufacture Calibre 4401
Total diameter: 32 mm (14 lignes)
Total thickness: 6.8 mm
Number of jewels: 40
Number of parts: 381
Minimum power reserve guaranteed: 70 h
Frequency of balance wheel: 4 Hz (28,800 vibrations/hour)

Flyback chronograph, hours, minutes, small seconds, date

Black ceramic case, glare-proofed sapphire crystal and titanium caseback, black ceramic push-pieces and crown, water-resistant to 50 m.

Blue dial with vertical satin finish, blue snailed counters, blackened gold applied hour-markers and Royal Oak hands with luminescent coating

Black ceramic bracelet with titanium AP folding clasp and invisible pins