Ulysse Nardin Blast Tourbillon

Ulysse Nardin's Blast Tourbillon, reference 1723-400/BLACK, has a titanium case measuring 45 mm across. The case is 12.6 mm thick, finished in black DLC for a dark, technical look. A sapphire crystal covers the dial, which pairs black and red tones with twelve applied indexes. The self-winding calibre UN-172 drives the watch, with a flying tourbillon visible on the dial and a power reserve of 72 hours. The escapement is made of silicon, a detail that speaks to Ulysse Nardin's ongoing material experiments. An alligator and rubber strap combination completes the piece. Water resistance is rated to 50 metres, modest for a case of this size but consistent with a watch built around its movement rather than diving credentials.