Audemars Piguet Royal Oak Stainless Steel — Blue Grande Tapisserie Perpetual Calendar Dial | Ref. 26674ST.OO.1320ST.01

The Royal Oak Perpetual Calendar represents the highest expression of complication within Genta's original steel architecture — a feat of miniaturisation that encodes the complete Gregorian calendar, including leap year cycle and astronomical moon phase, into a case that retains the Royal Oak's signature integrated-bracelet silhouette. The 2025-production 26674ST brings this perpetual calendar achievement into the current generation with a 41 mm stainless-steel case and bracelet finished to the Royal Oak's exacting alternating polish-and-satin standard.

At the heart of the 26674ST beats Calibre 7138, an in-house selfwinding manufacture perpetual calendar movement of considerable complexity — 423 components, 41 jewels, and a 55-hour power reserve running at 4 Hz (28,800 vph) for outstanding rate stability. The perpetual calendar displays week indication, day, date, astronomical moon, month and leap year through tone-on-tone subdials that sit harmoniously within the Grande Tapisserie blue dial, their matching inner bezel and 18-carat white-gold hour-markers filled with luminescent material providing legibility without disrupting the guilloché's hypnotic geometry.

The integrated stainless-steel bracelet with AP folding clasp and 50-metre water resistance completes a package that is, technically, a full-dress complication in a sports watch body — a paradox that has always defined the Royal Oak's singular appeal. Presented with original box and papers under Audemars Piguet's two-year warranty, the 26674ST is a definitive statement piece for the serious collector who demands perpetual calendar capability without sacrificing the iconic Royal Oak identity.