Royal Ammar bin Humaid Al Nuaimi spotted wearing a Audemars Piguet

Crown Prince of Ajman Sheikh Ammar bin Humaid Al Nuaimi was recently photographed wearing the Audemars Piguet Royal Oak Selfwinding Perpetual Calendar Ultra-Thin in platinum, reference 26586IP — a watch that manages to combine one of haute horlogerie's most demanding complications with a case profile slim enough for a dress watch.

The 26586IP is built around Calibre 5133, a self-winding perpetual calendar movement measuring a remarkable 2.89mm in height and 26.6mm in diameter. The complete movement sits at just 5.5mm thick inside a 41mm platinum case, achieving the kind of thinness that typically forces manufacturers to choose between automatic winding and perpetual calendar complexity — AP engineered a solution that refuses to compromise. The movement delivers day, date, month, moon phase, and leap-year indication with the full four-digit year display, all correctable via the crown alone without pushers.

The Royal Oak Perpetual Calendar lineage dates to 1984, when AP introduced the first Royal Oak perpetual calendar, building on Gerald Genta's original 1972 octagonal bezel design. The ultra-thin iteration represented a contemporary re-engineering of that heritage, stripping mass without sacrificing function. The platinum 26586IP presents the slate-grey Grande Tapisserie dial — a colour and texture combination that reads differently under light than the more common steel or gold versions, adding a layer of visual complexity that serious collectors recognise.

Sheikh Ammar is a well-documented watch enthusiast and his choice of the 26586IP signals a preference for technical depth over decorative excess. Platinum Royal Oak references occupy a quieter, more considered segment of AP's output — fewer are produced than gold or steel equivalents, and the material's density gives the bracelet a distinctly different wrist presence. Among collectors, the ultra-thin perpetual calendar in platinum is regarded as one of the most complete statements AP currently makes.

At a UK list price of £110,000, the Audemars Piguet Royal Oak 26586IP occupies the upper tier of the brand's catalogue. Grey-market values have held firm given platinum's relative scarcity in the Royal Oak range and the complication's appeal to buyers who find tourbillons redundant. Demand remains steady among Gulf-region collectors and European enthusiasts alike.