The Audemars Piguet Royal Oak Chronograph Ref. 26331ST.OO.1220ST.01 merges the brand’s iconic luxury-sport design language with the precision and functionality of a high-end chronograph. Rendered entirely in stainless steel, it retains the Royal Oak’s instantly recognizable silhouette — the octagonal bezel secured by exposed screws, integrated bracelet, and refined brushed-polish transitions — while introducing balanced chronograph subdials that complement the dial’s symmetry. Its blue “Grande Tapisserie” dial with contrasting silver counters radiates depth and texture, embodying both sportiness and sophistication. Driven by the self-winding Calibre 2385 movement, the 26331ST unites technical excellence, everyday wearability, and the enduring design DNA that defines the Royal Oak.
Specifications
Reference: 26331ST.OO.1220ST.01
Collection: Royal Oak Chronograph
Case Material: Stainless steel
Case Diameter: 41 mm
Case Thickness: ~11.0 mm
Bezel: Octagonal stainless-steel bezel with exposed hex screws
Crystal: Scratch-resistant sapphire with glare-proof treatment
Dial: Blue “Grande Tapisserie” pattern with silver subdials and applied markers
Hands: White-gold hands and hour markers with luminescent coating
Movement: Audemars Piguet Calibre 2385 automatic
• Frequency – 21,600 vph (3 Hz)
• Power Reserve – ~40 hours
• Functions – Hours, minutes, small seconds, 12-hour and 30-minute chronograph counters, date
• Chronometer Grade Finishing – Hand-decorated bridges and rotor with Geneva striping
Bracelet: Integrated stainless-steel bracelet with AP folding clasp
Water Resistance: 50 m / 5 ATM