The Ulysse Nardin Diver [AIR] is a dive watch under 52 grams

Announced under a 1 April 2025 embargo, Ulysse Nardin’s Diver [AIR] weighs less than 52 grams with its strap on and less than 46 without. It is a 44 mm watch rated to 200 metres.

For scale, against Ulysse Nardin’s own recent divers:

• Diver 44 (2019): 120.5 g
• Diver X Skeleton (2021): 105.8 g
• Diver [AIR] (2025): under 52 g (with strap)

The UN-374 weighs seven grams, less than a two-euro coin at 8.5. Ulysse Nardin rates the movement for a 5,000 g impact and a 90-hour power reserve.

Fishing nets and racing-boat carbon

Ulysse Nardin’s parts list reads like a salvage manifest:

• Case sides (Nylo-Foil): 60 percent recycled fishing net, 40 percent upcycled carbon fibre.
• Bezel (CarbonFoil): upcycled carbon fibre from IMOCA ocean-racing boats.
• Bridges, main plate, middle case: 90 percent recycled titanium (TiFast and Thyssenkrupp), some reclaimed from the Swiss biomedical industry.
• Escapement: upcycled silicon wafers.

The press release frames the list as sustainability. Their low mass is also part of the weight-saving programme across the case and calibre.

The bezel gives away its origin too. The upcycled IMOCA carbon finishes in irregular grey patches, closer to marble than to a woven pattern. Our February 2025 hero frame shows the mottling close up.

Open space around the UN-374

The UN-374’s openworked construction is visible from the dial side, with wheels and narrow bridges exposed beneath the hands.

Our display photograph shows the watch on its white strap, with droplets along the strap and bezel. Ulysse Nardin supplies two interchangeable straps with the Diver [AIR], one white and one orange.

Automatic winding and the dive-watch brief

The release says automatic winding was retained because Ulysse Nardin treats it as essential to the standards a dive watch must meet. A hand-wound movement would have shed more grams. Instead, the barrel was reworked into a flying arrangement to save weight elsewhere.

Ulysse Nardin still rates the result to 200 metres. The release says that at that depth the sapphire crystal would face pressure equivalent to 170 kilograms placed on it.

Against Ulysse Nardin’s own Diver 44, the saving is 68.6 grams.

Price and availability

Production. Neither the release nor the current official exact-reference pages state a production status or an edition size.

Retail. €34,700 / $34,300 / CHF 32,500, as of Apr 2025 (launch prices; CHF/EUR/GBP incl. VAT, USD excl., as the release states them)