With a movement of 2.89 mm in thickness and a case of 6.3 mm in height, Audemars Piguet’s Royal Oak Self-winding Perpetual Calendar Ultra-Thin has become the world’s thinnest automatic perpetual calendar wristwatch, marking the Swiss brand’s latest technological milestone.
The manufacture’s R&D team has integrated movement development, design and ergonomics in the conception of this new timepiece to boost its efficiency, robustness and reliability. The result is an ultra-thin self-winding perpetual calendar wristwatch equipped with a complex movement re-engineered to integrate an ultra-thin case, perfectly fitting under the sleeve of a shirt and endowed with a refined dial design enhancing visibility.
To reach an ultra-thin movement of 2.89 mm in height, the perpetual calendar functions, normally arranged on three levels, have been merged into one single layer. This led to the development of two patented innovations: The end-of-the-month cam has been integrated with the date wheel, while the month cam has been combined with the month wheel. The geometry of each component has also been optimized from the onset, reducing adjustment and assembly time. The dial, too, has been redesigned compared to previous Royal Oak Perpetual Calendar models. The day, date and month sub-dials have been enlarged for optimum legibility, while the night and day indication at 8 o’clock has been added symmetrically to the leap year indication positioned at 4 o’clock.
Evolving from the initial 950 platinum RD#2 prototype presented in 2018 at the Salon International de la Haute Horlogerie, the new timepiece combines titanium and 950 platinum for an elegant look and a lighter feel on the wrist.
Audemars Piguet is one of the oldest Swiss manufacturers of luxury mechanical watches and clocks.