Ulysse Nardin Marine Chronometer Manufacture 45mm Watch, round 18k rose gold case (45mm diameter, 12.5mm thickness) with transparent caseback, alligator strap with 18k rose gold deployant clasp, white enamel dial with black luminous hands and black Roman numerals, power reserve indicator at 12 o'clock, sub-seconds dial at 6 o'clock, date calendar within the sub-seconds dial, in-house Caliber UN-118 self-winding certified chronometer movement with silicium escapement and 60 hours of power reserve, scratch-resistant sapphire crystal, water-resistant to 200 meters.The Ulysse Nardin Marine Chronometer Manufacture watch is powered by the UN-118 Caliber movement, which is conceived and executed entirely in-house. In addition, the Chronometer Manufacture also utilizes Ulysse Nardin's new DiamonSil escapement.