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Every year, around late March to early April, the entire watchmaking world — brand executives, retailers, journalists, and of course, watch aficionados from all over — gathers for the biggest celebration of horology: Watches & Wonders. This is where all the new timepieces are revealed — simple or complex, men’s or women’s, classic or avant-garde.
And every year, regardless of who you are or what you do, there’s always something that grabs everyone’s attention — the so-called “talking pieces.” These are the headline-grabbing watches that brands use to generate buzz. Often, these showstoppers are far more than just attention-seeking gimmicks — they introduce true innovations, redefine technical limits, or break world records in categories like ultra-thinness, complexity, lightness, and precision.
This year, four watches stood out above the rest — each one pushing the boundaries of what’s physically and technically possible in modern watchmaking. In fact, I can’t remember another time, in my 25 years of attending the world’s top watch fairs, when so many world records were set in a single edition.
So, what were the 4 world records set at Watches & Wonders 2025? Four extraordinary timepieces, each one a world-first in its category.
Vacheron Constantin unveiled the world’s most complicated wristwatch — the phenomenal Les Cabinotiers Solaria. We’re talking: 41 complications, 5 rare astronomical complications including one world-first, a groundbreaking Westminster minute repeater, 13 patent applications, 8 years of development, and a total of 1,521 components.
This incredible timepiece was introduced to mark the 270th anniversary of the Swiss maison — a powerful statement from the oldest continuously operating watch brand in the world. And what a statement it is.
Bulgari claimed its tenth world record for thinness in just eleven years with the new Octo Finissimo Ultra Tourbillon. This 20-piece limited edition joins the legendary Octo Finissimo collection.
For context, Bulgari’s previous thinnest tourbillon world record was set in 2014, measuring just 1.95 mm thick.
The new Octo Finissimo Ultra Tourbillon, made from titanium, now holds the crown as the thinnest tourbillon wristwatch in the world, with a case only 1.85 mm thick.
Ulysse Nardin may have unveiled just one new model at Watches & Wonders — but that was all it needed to make waves. The Diver (Air), with a case made from titanium and carbon, weighs just 52 grams — making it officially the world’s lightest mechanical dive watch.
To achieve this astonishingly low weight (yes, that’s including the strap!), Ulysse Nardin developed the innovative calibre UN-374, operating at 3 Hz (21,600 vibrations/hour), and redesigned it entirely from the ground up — all without sacrificing performance or reliability.
Grand Seiko introduced the latest evolution of its Spring Drive movement: the 9RB2 calibre, now recognized as the most accurate spring-driven mechanical movement in the world. We’re talking about an accuracy of ±20 seconds per year — that’s about ±3 seconds per month, a level of precision usually associated with daily deviation in traditional mechanical watches.
For those unfamiliar, Spring Drive movements are truly unique. Instead of a traditional escapement, they use a gliding wheel regulated by a quartz oscillator and an electronic circuit — a hybrid mechanism powered mechanically by the mainspring barrel. In other words, it’s a mechanical movement with quartz-level accuracy.
