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For a decade, Vacheron Constantin sat out the ultra-thin sports watch arms race. While Audemars Piguet and Patek Philippe kept trimming millimeters off the Royal Oak and Nautilus, the Overseas was still running a movement whose architecture traced back to a Jaeger-LeCoultre caliber from 1968. That ended this week in Geneva, and the answer is a watch I would have a very hard time giving back.
At Watches & Wonders 2026, Vacheron unveiled the Overseas Self-Winding Ultra-Thin reference 2500V/210P-H028, a 39.5mm platinum watch built around the brand-new Calibre 2550. The headline number is 7.35mm. That is how thick the whole watch is, case included, which makes it slimmer than the Royal Oak 16202ST (8.1mm) and the Nautilus 5811 (8.3mm). In a category where tenths of a millimeter become bragging rights, Vacheron just moved to the front of the grid.
What the New Movement Actually Does
Calibre 2550 took seven years to develop, and the engineering choices are worth paying attention to. The movement is 2.4mm thick, built around a platinum micro-rotor integrated directly into the mainplate rather than stacked on top of it. That alone saves meaningful vertical space. Then there are the two barrels, stacked vertically on a single axis and running in series, which is what pushes the power reserve to 80 hours. For context, the Royal Oak’s calibre 7121 runs 55 hours, and the Nautilus caliber 26-330 S C offers 35 to 45. Vacheron isn’t just matching the competition on thinness. It’s beating them on autonomy while they’re at it.
The gear train was also redesigned to operate on a single level, which feeds back into the slim case. The 950 platinum micro-rotor itself measures 15.5mm, and platinum’s density is doing real work here, giving the rotor enough mass to wind efficiently despite its reduced size.
The Case Is the Other Story
This is the first Overseas ever rendered entirely in 950 platinum, including the bracelet and clasp. And Vacheron didn’t use a standard platinum alloy. The metal here is cut with 5% copper and gallium, then thermally hardened to boost scratch and shock resistance to roughly 2.7 times that of conventional 950 platinum. A good idea, because anyone shelling out for this watch is going to wear it, and platinum normally scratches if you look at it wrong.
The salmon dial is the emotional anchor. Sunburst satin in the center, velvet-textured minute track around the edge, 18k white gold markers and hands filled with blue Super-LumiNova. Salmon-on-platinum is a combination pulled directly from Vacheron’s 1940s archive and has become shorthand for high-end collector pieces across the industry. It looks as good in person as it does in the press shots, which is not always the case with salmon dials under different lighting.
Water resistance is rated to 50 meters, and the tool-free strap change system ships with three options: the platinum bracelet with half-Maltese cross links, a beige rubber strap, and a dark beige alligator strap with a nubuck finish. That last one is what I would probably spend most of my time with.
Who This Is Actually For
Let’s be honest about what this watch is. The price is $120,000. Production is capped at 255 numbered pieces, all sold through Vacheron boutiques only. This is not a daily beater for the average watch enthusiast, and framing it as one would be dishonest. It’s a grail piece for collectors who already have the AP and the Patek and want the Vacheron to complete the set, and it’s going to sell out before most boutiques finish unboxing them.
What makes it interesting for the rest of us is what it signals. The Calibre 2550 is clearly going to form the base for future Overseas complications, and a steel version with this movement at a more reachable price point feels inevitable. If that ships at something closer to the regular Overseas Self-Winding money, the sports watch conversation shifts meaningfully. Until then, this platinum piece is the statement, and it’s a loud one.
