Ulysse Nardin Blast Hourstriker

The Ulysse Nardin Blast Hourstriker, reference 6215-400-3A/02, has a 45 mm titanium and gold case with a black PVD coating, a flying tourbillon and a rubber and titanium strap. At 16 mm thick, the case has a water-resistance rating of 30 metres. Self-winding calibre UN-621 has a power reserve of 60 hours, a silicon escapement and 46 jewels and runs at 28,800 vibrations per hour. The openworked dial displays hours and minutes beneath a sapphire crystal. The hourstriker chimes the hours and half-hours, with hammers striking a gong shaped around the regulating cage. A titanium membrane developed with Devialet is incorporated into the movement. Individual numbering is engraved on the side of the case.