Royal Juan Carlos I spotted wearing a Richard Mille

Juan Carlos I, who abdicated the Spanish throne in 2014 but has never shed his reputation as one of Europe's most watch-literate royals, was recently spotted wearing what many collectors regard as the single most historically significant Richard Mille ever produced: the RM009 Tourbillon 'Felipe Massa', a 25-piece limited edition that redefined what a luxury sports watch could physically be.

Introduced in 2005 and developed in close collaboration with Formula 1 driver Felipe Massa, the Richard Mille RM009 was built around a case material unlike anything the watch industry had seen on a wrist. ALUSIC — a proprietary metal matrix composite combining aluminum with silicon carbide particles, forged under extreme conditions in a high-speed centrifugal furnace — delivered a case of exceptional rigidity and thermal stability at a total watch weight of just 28 grams. For context, many dress watches of comparable diameter weigh two to three times as much. The movement is a manually wound tourbillon calibre, skeletonised and engineered to withstand the vibration loads of an F1 cockpit, with the characteristic Richard Mille architecture of a baseplate and bridges machined from high-tech composites rather than traditional brass.

The RM009 holds a foundational place in the Richard Mille narrative. Before this reference, ultra-lightness in fine watchmaking was largely theoretical. The RM009 made it tangible, wearable, and — at 25 pieces — almost impossible to acquire. It established the template for every subsequent ultra-light Richard Mille, including the later NTPT carbon and TPT Quartz references that now define the brand's aesthetic.

For Juan Carlos I, the choice is telling. The former king has been photographed over decades with a range of serious complications, and the RM009 is emphatically not a decorative piece — it is a watchmaker's argument, expressed in aerospace materials and open mechanics. It signals a collector who understands provenance and technical achievement over mere visibility.

On the secondary market, the Richard Mille RM009 Felipe Massa commands prices that reflect both its rarity and its foundational status. With an original retail price of approximately $349,000 and only 25 examples in existence, auction appearances are rare events. Grey-market estimates for pieces in documented condition now comfortably exceed the original retail figure, with some transactions reported well above $500,000.