Movement Swissmechanical automatic Power reserve 3 8 hours Frequency 28, 800 vph ( 0 H z) 26 Jewels / Decorated by DOXA Case Stainless steel aged coating Diameter 42. 50 mm x 44. 50 mm / Height 14 mm Screw down crown Water resistance 120 ATM 1200 meters 4, 000 feet screw down case back Indications Hours, minutes, seconds date Features Flat sapphire crystal Unidirectional rotating bezel for calculating and monitoring no decompression dive times Helium release valve Dial with hand made decorative grinding old radium Super Lumi Nova indexes Bracelet Strap Stainless steel Beads of Rice bracelet aged coating.