ulysse nardin marine chronometer manufacture 43mm solid 18k rose gold watch 1186-126/63 ulysse nardin ulysse nardin marine chronometer manufacture 43mm watch, round 18k rose gold case (43mm diameter, 12mm thickness) with transparent caseback, alligator strap with 18k rose gold deployant clasp, blue dial with rose gold luminous hands and applied rose gold arabic 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.