DIVER DEEP DIVE – LIMITED & NUMBERED EDITION OF ONLY 100 PIECES. Black DLC coated titanium case. Black dial. Date window at 3 o’clock position. Seconds sub-dial between the 4 & 6 o’clock positions. Automatic helium decompression valve system at 9. Ulysse Nardin caliber UN-320 with a silicium spiral and anchor escapement. beats at 28,800 vph, contains 39 jewels & has an approximate power reserve of 48 hours.