Royal Tunku Ismail Ibni Sultan Ibrahim spotted wearing a Patek Philippe

Tunku Ismail Ibni Sultan Ibrahim, Crown Prince of Johor and one of Southeast Asia's most recognisable royals, was recently spotted wearing one of the most opulent references in Patek Philippe's current catalogue — the Nautilus 5719/10G in 18K white gold, fully set with factory diamonds. For a wrist already accustomed to serious watchmaking, this is a statement even by those standards.

The Patek Philippe Nautilus 5719/10G represents the summit of the diamond-set Nautilus range. Built on Gerald Genta's 1976 design — the same integrated-bracelet silhouette that transformed haute horlogerie's relationship with sports-luxury watches — the 5719 takes the familiar 40mm octagonal bezel architecture and covers it in baguette and brilliant-cut diamonds across the bezel, case flanks, dial, and lugs. The movement inside is the calibre 324 S C, a self-winding manufacture ebauche offering hours, minutes, seconds, and date, with a 45-hour power reserve. It runs at 28,800 vph and is visible through the exhibition caseback — a refined finishing exercise in its own right.

From a collector standpoint, the 5719/10G occupies rare territory. Factory diamond-set Pateks carry a significant premium over their non-set counterparts, not simply for the stones themselves but for the extraordinary case modification work carried out in-house at the Geneva manufacture. The integrity of the original Genta case geometry must be maintained while accommodating hundreds of individually set diamonds — work that justifies both the price and the long waiting lists this reference commands.

Tunku Ismail is no casual watch wearer. The Crown Prince has previously been seen with a range of significant Patek Philippe, Rolex, and independent watchmaker pieces, and his choices tend to reflect a genuine collector's sensibility rather than mere status display. His selection of the 5719/10G aligns naturally with a profile that balances institutional gravitas with personal confidence.

At a UK list price of approximately £343,000, the Nautilus 5719/10G converts to roughly $430,000 USD at retail — a figure that already makes it one of the most expensive watches in regular Patek production. On the secondary market, demand from Middle Eastern, Asian, and European collectors keeps grey-market premiums firmly above list, with confirmed sales regularly recorded in the $500,000–$600,000 range depending on condition and provenance.