Ulysse Nardin Blast Tourbillon

The Ulysse Nardin Blast Tourbillon, reference 1725-400-3B/02, has a 45 mm titanium and 18k gold case, a flying tourbillon and a velvet rubber strap. Measuring 12.6 mm thick, the case carries a water-resistance rating of 50 metres. The openworked dial displays hours and minutes beneath a sapphire crystal. Individual numbering is engraved on the side of the case. A platinum micro-rotor is visible from the front at 12 o'clock. Self-winding calibre UN-172 has a power reserve of 72 hours, a silicon escapement and 25 jewels and runs at 18,000 vibrations per hour.