Ulysse Nardin 3743-170-2A/0A Diver AIR Titanium 44mm Skeleton Dial Watch

Ulysse Nardin Diver [AIR] 44 mm – Reference 3743-170-2A/0A

The Ulysse Nardin Diver [AIR], reference 3743-170-2A/0A, reigns as the world’s lightest mechanical dive watch—an engineering marvel delivered in a robust 44 mm titanium and carbon-fiber composite case. Weighing just 52 g with its strap (46 g without), this Ulysse Nardin creation challenges preconceptions of dive watch heft and performance, while maintaining full diving functionality and lasting durability.

Featherweight Titanium Carbon Construction

The Dual-layer case combines a recycled titanium core with Nylo-Foil™ carbon fiber side elements—produced from upcycled fishing nets and racing-grade carbon leftovers—to yield a 44 mm case at a slim 14.7 mm depth and excellent 200 m water resistance. This inventive case design supports the timepiece’s claim as the lightest mechanical diver.

Skeletonized UN‑374 Movement

At the heart lies the in-house Calibre UN‑374, a skeletonized evolution of the UN‑372. Featuring lightweight titanium bridges forming a signature “X” motif, an exposed barrel, silicon escapement, and open-work architecture, it achieves immense visual depth while weighing a mere 7 g—contributing significantly to the watch’s featherlight profile. It offers 90 hours of power reserve and endurance to 5,000 g shocks.

Strap Wearability

3743-170-2A/0A includes two ultra-light elastic fabric straps (white + orange), each weighing less than 6 g and fastened by a minimalist pin buckle. Their low weight and supple texture ensure ease of wear from boardroom to surf. Additionally, the watch supports optional R‑STRAP and rubber varieties.

Dial Bezel: Bold, Legible Functional

The skeletonized dial features raised applied indices and wide baton hands coated in white Super-LumiNova, ensuring visibility in all light levels. A textured carbon-fiber bezel adds resilient functionality and enhances grip, while maintaining the streamlined, high-performance ethos of the Diver [AIR].

Unique Features That Define 3743-170-2A/0A

• World’s lightest mechanical diver: 52 g total weight with strap—unmatched in its category.
• Case material: Recycled titanium + carbon fiber (Nylo‑Foil) for strength and sustainability.
• Movement: Skeletonized UN‑374, 90 h power reserve, silicon parts, shock-resistant.
• Water resistance: 200 m, with diver-bolt bezel grip and sapphire crystal protection.
• Straps: Dual ultra-light fabric, plus compatibility with R-strap and rubber.
• Limited weight but full diver functionality.

Why the Diver [AIR] Stands Apart

Unlike traditional dive watches built to withstand depth through added mass, the Diver [AIR] pushes boundaries with material science and skeleton architecture. Its featherweight design and 90-hour performance make it ideal for collectors who demand technical innovation, performance, and portability without bulk. Beyond specs, its sustainable material use and visual complexity speak volumes.

Who 3743-170-2A/0A For

— Professional divers and extreme sports enthusiasts seeking a high-performance, lightweight companion.
— Eco-minded collectors drawn to upcycled materials and pioneering design.
— Watch aficionados wanting a dramatic, statement-making diver that weighs less than most chronographs.

Technical Overview

• Reference: 3743-170-2A/0A
• Case: 44 mm titanium core + Nylo‑Foil carbon, 14.7 mm thick, 200 m WR
• Movement: Calibre UN‑374—skeletonized, 90 h reserve, reinforced with titanium and silicon, 4 Hz
• Straps: Two ultra-light elastic fabric straps (<6 g), compatible with R‑STRAP/rubber
• Bezel: Carbon-fiber diver scale
• Weight: 52 g complete with strap; 46 g without strap

Conclusion

The Ulysse Nardin Diver [AIR] 3743‑170‑2A/0A is a rare combination of haute horlogerie, environmental innovation, and diver-grade capability—all condensed into a super-lightweight form that challenges everything you thought a serious dive watch could be. It’s a tangible statement of forward-thinking luxury.