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Watches & Wonders 2025: Ulysse Nardin Surpasses the Depths with the Diver [AIR]
01 Apr 2025 · 6 min read

At a time when the dive watch genre appears to have explored every conceivable frontier, Ulysse Nardin delivers an arresting statement: the world’s lightest mechanical dive watch. The Diver [AIR] doesn’t just cut weight—it redefines it. With a presence that is nearly imperceptible on the wrist and a spirit engineered for the deep, it stands as a striking reminder that innovation in watchmaking still has depth left to uncover.


For over 175 years, Ulysse Nardin has been entwined with the maritime world. From its roots as a creator of precision marine chronometers to today’s forward-thinking designs, the brand has never been content with convention. The Diver [AIR] continues this tradition—not by looking back, but by vaulting forward. Conceived for those who live life at full tilt, it is the result of years of research and experimentation in materials science, horological engineering and performance design.

Lightness as a Form of Strength
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Crafted in Carbonium and titanium, the Diver [AIR] balances structural integrity with near-weightless wear

At a mere 52 grams, the Diver [AIR] is a masterclass in material innovation. The case incorporates Carbonium, a cutting-edge composite made from carbon fibres sourced from aerospace-grade manufacturing waste. It’s lighter than titanium, yet offers exceptional rigidity. This is paired with a caseback crafted in titanium, selected for its strength-to-weight ratio and corrosion resistance—ideal for marine conditions. The overall design exudes a sense of robustness and clarity, stripped of any unnecessary ornamentation and focused entirely on utility.

A Play of Texture and Transparency
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Bold hands and luminous indices command attention on the skeletonised dial
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The openworked dial reveals the full choreography of the UN-374 calibre

The dial adopts a skeletonised structure that balances functional legibility with an architectural openness. Rather than concealing the movement, it reveals it—inviting a visual interaction with the oscillations and energy flow within. Key elements such as indices and hands are treated with luminescent material, ensuring underwater readability while keeping visual clutter to a minimum. The interplay of negative space and structural detailing underscores the watch’s uncompromising pursuit of lightness, both in weight and in design.

A Beating Heart from Le Locle
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The Diver [AIR] reveals its architectural heart with an openworked movement built for endurance, precision and clarity

Powering the Diver [AIR] is the UN-374 automatic calibre—an in-house movement with a 72-hour power reserve and a silicon balance spring. Its construction highlights Ulysse Nardin’s expertise in high horology, but also signals a shift towards greater performance efficiency. The movement is built with a clear view to the future—combining traditional mechanical finesse with contemporary innovation in friction resistance and shock absorption.

Engineered for Versatility
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Wear the Diver [AIR] in either orange or white rubber straps

Complementing the ultra-light case is a high-performance rubber strap that provides ergonomic comfort and durability in equal measure. The use of textured surface patterns enhances grip without compromising the strap’s tactile softness. With quick-release functionality, it seamlessly blends form and function, echoing the watch’s ethos of practical innovation.

Final Thoughts


The Diver [AIR] is not merely about shaving grams; it is about demonstrating how weightlessness can amplify presence. By stripping away excess, Ulysse Nardin has carved out space for pure expression—an aesthetic and mechanical clarity that elevates the idea of a contemporary dive watch.

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