Watch Paparazzi

Royal Hassanal Bolkiah spotted wearing Patek Philippe

Hassanal Bolkiah, the 29th Sultan of Brunei and one of the most prolific watch collectors on the planet, was recently spotted on the wrist of royalty — specifically, with a Patek Philippe Nautilus Perpetual Calendar reference 5740/1G secured to his wrist. For a man whose collection is rumored to number in the thousands, the choice of this particular reference is telling. This is not a watch worn for visibility alone; it is a watch worn because it earns its place even in the most extraordinary company.

The Patek Philippe Nautilus 5740/1G debuted at Baselworld 2018 as the first Nautilus to house a perpetual calendar complication. Powered by the caliber 240 Q, an ultra-thin self-winding movement measuring just 3.28mm in height, the watch displays a complete perpetual calendar — month, date, day, leap year, and moon phase — across a horizontally structured dial in a case that measures 40mm in diameter and a remarkably svelte 8.42mm in thickness. The case and integrated bracelet are executed in 18K white gold, giving the reference 5740/1G a cooler, more formal presence than its rose gold sibling.

From a collector standpoint, the 5740/1G represents a genuine technical achievement. Patek Philippe engineers had to redesign the movement architecture significantly to fit perpetual calendar functionality within the constraints of the Nautilus case profile. The result is a watch that sits flat on the wrist despite its mechanical complexity — a detail that rewards the wearer privately and impresses experts publicly. Production volumes have always been tightly controlled, and the reference commands immediate attention on the secondary market.

For Hassanal Bolkiah, this sighting adds another data point to an already extraordinary collecting biography. The Sultan has been documented wearing everything from vintage Rolexes to complicated pocket watches, and his Patek Philippe holdings alone are believed to be among the most significant in private hands worldwide. Spotting him in the 5740/1G speaks to the reference's standing as a modern classic worth wearing, not merely owning.

At retail, the Patek Philippe Nautilus Perpetual Calendar 5740/1G carries a list price of approximately $140,000. On the grey market, the reference consistently trades at a substantial premium, with current valuations placing it around $365,000 — reflecting both restricted supply and sustained collector demand for this white gold perpetual calendar in one of watchmaking's most recognized case designs.