Youtuber Mark Rober spotted wearing a Jacob & Co

Mark Rober, the former NASA engineer turned YouTube phenomenon known for his viral engineering experiments and record-breaking Guinness stunts, stepped onto the Met Gala red carpet wearing one of the most mechanically complex wristwatches available on the planet — the Jacob & Co Astronomia Sky in platinum, reference AT110, limited to just 18 examples.

The Jacob & Co Astronomia Sky AT110 is built around the JCAM09 hand-wound movement, a four-arm rotating carrousel that performs a full rotation every 10 minutes. Mounted on those arms are a triple-axis flying tourbillon completing its innermost rotation every 60 seconds, a Jacob-cut diamond acting as a counterweight, a blue celestial sphere rotating on its own axis every 60 seconds to mirror the Earth's rotation, and a time display subdial that counter-rotates to remain legible. The movement beats at 21,600 vph and offers approximately 60 hours of power reserve. The platinum case measures 47mm and opens 180 degrees via a caseband hinge, placing the entire movement on theatrical display.

The Astronomia Sky series debuted in 2014 and immediately redefined what independent watchmaking could look like in the modern era. Jacob & Co — founded by New York jeweler Jacob Arabo — positioned the Astronomia not as a dress watch or a tool watch, but as a kinetic sculpture worn on the wrist. The AT110 platinum variant, limited to 18 pieces globally, sits at the apex of the Astronomia family and has become a serious collector reference, frequently discussed alongside grand complications from Patek Philippe and Roger Dubuis for sheer movement architecture complexity.

Rober's appearance at the Met Gala with the Astronomia Sky is culturally pointed. His brand is built on precision engineering made accessible and entertaining — and there is a coherent logic in a man who designs trebuchets and glitter bombs choosing a watch that functions as a miniature orrery. The Met Gala's theme provided the backdrop, but the watch told its own story.

With a list price of $740,000 and production capped at 18 units, the Jacob & Co Astronomia Sky AT110 in platinum rarely surfaces on the secondary market. When it does, grey market values hold close to retail or exceed it, reflecting genuine scarcity rather than speculative inflation. For collectors, a sighting on one of the world's most photographed red carpets only reinforces the reference's profile.