Royal Tunku Ismail Ibni Sultan Ibrahim spotted wearing a Patek Philippe

The Crown Prince of Johor, Tunku Ismail Ibni Sultan Ibrahim — known to his social media following as TMJ — was recently spotted wearing the Patek Philippe Nautilus 5712/1R in 18k rose gold, a reference that represents the most complication-rich expression of the iconic Nautilus line. For collectors, the 5712 is not merely a status piece; it is a genuine feat of miniaturized engineering housed in one of watchmaking's most recognizable cases.

The 5712/1R is built around the ultra-thin Caliber 240 PS IRM C LU, a manually and automatically wound movement measuring just 3.88mm in height. It delivers hours, minutes, seconds, a power reserve indicator, an instantaneous moonphase display accurate to one day's deviation every 122 years, and a date — all arranged with characteristic Patek restraint on a slate-grey dial. The 40mm rose gold case, with its horizontally embossed dial and integrated bracelet, traces its lineage directly to Gerald Genta's 1976 design brief for the original Nautilus Ref. 3700.

The 5712 was introduced in 2006 and quickly earned a reputation as the collector's Nautilus — the reference for those who wanted more than the pure sports aesthetic of the 5711. Available in stainless steel (5712/1A), white gold (5712G), and this rose gold variant, the 1R designation denotes the warm alloy that lends the watch a distinctly formal character. Patek discontinued the stainless steel 5711 in 2021, sending secondary-market prices for the entire Nautilus family into historic territory.

Tunku Ismail is one of Southeast Asia's most visible royals on social media, with a candid personal brand that extends to his watch choices. His selection of the 5712/1R signals an appreciation for complication over pure sportiness — consistent with a collector who understands what sits beneath the dial.

On the market, the Patek Philippe Nautilus 5712/1R carries an official retail price in the region of $195,000, reflecting both its precious metal construction and movement complexity. On the grey market, demand for rose gold Nautilus references remains robust, with the 5712/1R commanding premiums that push realized prices well above list — a pattern unlikely to reverse given Patek's historically conservative production volumes.