The Audemars Piguet Royal Oak Selfwinding Chronograph reference 26331ST.OO.1220ST.01 is a distinguished luxury sports watch that was introduced in 2017 to mark the 20th anniversary of the Royal Oak Chronograph line. This model features a 41mm stainless steel case with a thickness of 11mm, characterized by the collection’s iconic octagonal bezel secured by eight hexagonal screws and a glareproofed sapphire crystal. The centerpiece is its blue “Grande Tapisserie” dial, which is adorned with rhodium-toned sub-dials, white gold applied hour-markers, and Royal Oak hands featuring a luminescent coating for enhanced legibility. The watch is presented on an integrated stainless steel bracelet with an AP folding clasp and is water-resistant to 50 meters.
At the heart of the timepiece is the self-winding Calibre 2385, an automatic movement that incorporates a column-wheel chronograph mechanism and a vertical clutch for precise operation. The movement provides several complications, including a 1/4th second chronograph with a 30-minute counter at 3 o’clock and a 12-hour counter at 9 o’clock, along with small seconds at 6 o’clock and a date display positioned between 4 and 5 o’clock. It operates at a frequency of 3 Hz and offers a power reserve of approximately 40 hours.
General reviews of the 26331ST highlight its exceptional wrist presence and the refined aesthetic achieved by the contrasting two-tone dial design. Collectors and enthusiasts often praise the watch for its balance of sporty functionality and timeless elegance, noting the high quality of the brushed and polished finishing on the steel surfaces. While the 41mm size is noted for being substantial, the integrated bracelet is frequently commended for its comfort and seamless integration. Although phased out in 2022 to make way for newer generations, it remains a highly sought-after piece on the secondary market due to its classic proportions and the enduring appeal of the blue dial configuration.