Singer J Balvin spotted wearing a Jacob & Co

J Balvin was recently photographed wearing what is arguably the most architecturally complex wristwatch in his already remarkable collection: the Jacob & Co Astronomia Tourbillon in 18K rose gold, reference AT110.40.AA.SD.A, a piece limited to just 18 examples worldwide.

The Astronomia Tourbillon is the movement that cemented Jacob & Co's credibility among serious horological circles when it debuted in 2014. The calibre JCAM09 features a four-arm carousel that rotates on its central axis once every 10 minutes — an interval chosen deliberately so the wearer can watch the full cycle in real time. Each arm carries a distinct complication: a triple-axis tourbillon that rotates on three planes to comprehensively negate the effects of gravity, a time display module with its own differential gear train, a hand-painted magnesium earth sphere rotating on its axis once every 60 seconds, and a brilliant-cut diamond functioning as the sun. The movement operates at 18,000 vph with a 60-hour power reserve and is visible through a domed sapphire crystal from every angle. The rose gold case measures 47mm and houses all of this within a double-curved crystal architecture that functions as both display case and watch.

From a collector standpoint, the Astronomia Tourbillon ref. AT110.40.AA.SD.A occupies a genuinely rare position. With only 18 pieces made, secondary market availability is almost theoretical. The UK list price of £450,000 — translating to roughly $560,000 USD at current exchange — places it among the most expensive wristwatches from any independent maison, and the combination of scarcity and recognisability keeps grey-market demand consistently strong among ultra-high-net-worth collectors.

J Balvin is no casual watch buyer. The Medellín-born artist has been photographed over the years with Richard Mille skeletons, Patek Philippe complications, and various bespoke Jacob & Co pieces — the brand has collaborated with him directly on custom commissions. The Astronomia Tourbillon, however, is a statement even within that context: a watch that demands attention without requiring any celebrity endorsement to do so.

On the market, confirmed sales of the AT110.40.AA.SD.A reference are extremely rare given the 18-piece limitation. When examples surface privately, they routinely command premiums above list, with estimates in the $600,000–$700,000 range depending on provenance and condition. It is, by any measure, a museum-grade mechanical object worn on the wrist.