Crafted in 950 platinum, the 41mm case measures 9.5mm thick and features a glareproofed sapphire crystal, a sapphire caseback, and a screw-locked crown. Water resistance is rated to 20 metres. The 950 platinum bracelet closes with an AP folding clasp, carrying the same material refinement throughout.
The black dial is patterned with the Royal Oak's signature Grande Tapisserie texture and hosts two-tone black and rhodium-toned counters alongside white gold applied hour-markers. The Royal Oak hands carry a luminescent coating for low-light legibility, while a black inner bezel frames the composition.
Reference 26597PT.OO.1220PT.01 represents the perpetual calendar complication within the Royal Oak family — a pairing of an iconic octagonal architecture with a mechanism that accounts for the varying lengths of each month and leap years without manual correction.
