Audemars Piguet Royal Oak 26450ST.OO.1356ST.01-B Chronograph Stainless Steel Blue Dial (2026)

A chronograph defines Audemars Piguet Royal Oak 26450ST.OO.1356ST.01-B Chronograph Stainless Steel Blue Dial (2026); its construction brings together a 38mm stainless steel case, a blue dial, and an automatic movement.

The development spanning five years delivers not downsized version of 41mm's Caliber 4401 but complete reimagining optimized specifically for smaller proportions. Patented vertical clutch simplified to reduce mechanical complexity while improving pusher feel, directly driven design positioned centrally removes intermediate transmission wheels enhancing start/stop precision. Date window shifted midway between 4-5 o'clock maintaining better symmetry. The 38mm case measures 11.1mm thick representing minimal 0.1mm increase over predecessor despite housing entirely new movement architecture, executed in brushed stainless steel with octagonal bezel secured by eight exposed hexagonal screws with perfectly aligned slots. Water resistance is rated to 50 meters. No flyback functionality differentiates from larger 41mm Caliber 4401. The movement presents exceptional hand-finishing visible through sapphire caseback including straight-grained mainplate, beveled edges, and circular-grained ratchet wheel.

The dial layout redesigned for enhanced legibility: subdials repositioned further from center with 30-minute totalizer moved to 9 o'clock (previously 3), 12-hour counter relocated to 3 o'clock (previously 9), running seconds at 6 o'clock now featuring Arabic numerals at 20/40/60 for improved timing readability. The blue Grande Tapisserie dial is arranged with Royal Oak's original large-scale waffle pattern creating architectural depth through light and shadow interplay, the pattern's geometric precision requiring specialized stamping dies and multiple manufacturing steps to achieve consistent relief depth. Three blue tone-on-tone chronograph subdials with snailed finishing provide subtle textural variation: 30-minute totalizer at 9 o'clock, 12-hour counter at 3 o'clock, running seconds at 6 o'clock with white Arabic numerals at 20/40/60 improving legibility during chronograph timing.

Applied 18k white gold baton hour markers and matching Royal Oak hands filled with white luminescent material ensure visibility in low-light conditions while rhodium-toned inner bezel frames composition. Introduced early 2026, reference 26450ST represents most significant upgrade in 38mm Royal Oak Chronograph history—introducing entirely new in-house Caliber 6401 after nearly three decades utilizing Frédéric Piguet 1185 ébauche (rebranded Caliber 2385). Power reserve increased to 72 hours from predecessor's 40 hours representing 80% improvement addressing long-standing limitation while beat rate elevated to 28,800 vph (4Hz) from predecessor's 21,600 vph improving precision and chronograph accuracy. An exhibition caseback reveals the movement.

The self-winding Caliber 6401 comprises 348 components with 44 jewels, operating at 28,800 vph with robust 72-hour power reserve representing significant improvement over predecessor's 40-50 hours. The integrated column-wheel chronograph with patented directly driven vertical clutch positioned centrally removes intermediate transmission wheels simplifying construction while improving tactility.

Integrated stainless steel bracelet incorporates Royal Oak's signature H-link design with alternating brushed and polished surfaces flowing seamlessly from lugs, secured by AP's triple-blade folding clasp providing secure closure and micro-adjustment capability for precise sizing. The alternating satin brushing and polished bevels maintain Royal Oak's signature finishing complexity where each surface transition requires individual attention during manufacture. This piece was recently unveiled. To express interest, please inquire above and our team will contact you once we are able to secure it for you. Dated 2026, this example is offered in new condition with its original box and original papers.