Ulysse Nardin Diver (Air)

The 2019 predecessor of the Diver (AIR), which is being dubbed the ”lightest-ever mechanical dive watch” by its maker Ulysse Nardin, weighed 120.5 grams. The brand’s new skeletonized timepiece, however, has been trimmed down to an incredible 52 grams, including the strap (or under 46 grams without). Watch movements are commonly crafted from brass but here titanium, which is considerably less dense, offers a promising balance between lightness and torsional strength (though it also runs the risk of catching fire during machining). Ulysse Nardin has also integrated a lightweight and highly antimagnetic silicon regulator into its newest creation.