Beware of Blast Supercharged with classic Ulysse Nardin savoir-faire, Blast Tourbillon is an avatar of its time, a potent force of nature. This technological wonder made with rock-hard, masculine lines has ignited a flame that will send seismic shockwaves through the watchmaking world to its core. Caliber: UN-172 Manufacture movement Case: Titanium / Ceramic Glass: Sapphire Mechanism: Self winding Dimensions: Diameter 45mm Strap: Rubber