Description
Released early 2026, reference 26450OR.ZZ represents most luxurious expression of the newly upgraded 38mm Royal Oak Chronograph—combining factory diamond-set bezel with revolutionary in-house Caliber 6401 after nearly three decades relying on Frédéric Piguet 1185 ébauche architecture. The diamond bezel variant features forty brilliant-cut diamonds totaling approximately 0.92 carats set into the octagonal bezel, transforming the sports chronograph into high-jewelry statement while maintaining technical credibility through the entirely new manufacture movement. Where the 41mm Royal Oak Chronograph transitioned to proprietary Caliber 4401 in 2022, its larger dimensions prevented adaptation to 38mm case—leaving smaller variant as last Royal Oak chronograph dependent on outsourced movement until this five-year development culminated in purpose-built Caliber 6401. The sand gold-toned dial represents warmest, most elevated colorway among three launch variants (blue steel, grey rose gold, sand gold diamond), pairing beige subdials with precious metal tones creating monochromatic luxury aesthetic.
The 38mm case measures 11.1mm thick—minimal 0.1mm increase from predecessor despite housing entirely new movement—crafted in 18k rose gold with Gérald Genta’s iconic octagonal bezel now adorned with forty brilliant-cut diamonds expertly set between the eight exposed hexagonal screws with perfectly aligned slots, creating dazzling accent to technical achievement while maintaining the Royal Oak’s industrial-luxury DNA. The case features signature alternating satin-brushed surfaces and polished bevels creating striking depth and light play, with the diamond-set bezel adding additional brilliance to the already complex interplay of finishes. Polished rose gold chronograph pushers sit within brushed hexagonal guards at 2 and 4 o’clock positions, integrating seamlessly into the case architecture while the screw-locked crown maintains water resistance to 50 meters. Glareproofed sapphire crystals protect both the dial and exhibition caseback, the latter revealing Caliber 6401’s refined finishing for the first time in 38mm chronograph history. The sand gold-toned Grande Tapisserie dial features the collection’s signature waffle pattern rendered in warm precious metal hue, creating cohesive monochromatic field complemented by three beige-toned subdials with snailed finishing. The dial layout has been subtly redesigned to accommodate Caliber 6401: all three subdials positioned slightly further from center, with the 30-minute totalizer relocated to 9 o’clock (previously at 3 o’clock) and 12-hour counter moved to 3 o’clock (previously at 9 o’clock), while the running seconds subdial at 6 o’clock now features redesigned Arabic numerals at 20, 40, and 60 for enhanced legibility. Date window repositioned to sit exactly midway between 4 and 5 o’clock indices rather than abutting 5 o’clock, creating more symmetrical appearance. Applied 18k rose gold baton hour markers and matching Royal Oak hands filled with luminescent material ensure readability against the warm dial, framed by rose gold-toned inner bezel. The self-winding Caliber 6401 measures 27mm diameter by 5.7mm thickness, comprising 348 components with 44 jewels, operating at 28,800 vph with substantially enhanced 55-hour power reserve versus predecessor’s 40 hours. The integrated column-wheel chronograph with patented vertical clutch system reduces pressure needed to activate pushers while eliminating unnecessary play, though unlike larger Caliber 4401, the 6401 forgoes flyback functionality to maintain compact dimensions. Côtes de Genève striping adorns bridges visible through sapphire caseback alongside polished bevels and openworked rotor, though finishing features flat-cut chamfers reflecting AP’s industrial-haute horlogerie aesthetic. The integrated 18k rose gold bracelet flows seamlessly from case with Royal Oak’s H-link design, secured by AP triple-folding clasp.
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