42mm 316L Stainless Steel Case and Embossed Screw Caseback, Unidirectional 120-Click Dive Timing Bezel, Steel Screw Crown with Multiple O-Rings, Sapphire Crystal with Antireflective Coating, Water Resistant to 200 Meters, Solid Link Stainless Steel Bracelet with Integrated End Pieces and Safety Clasp, Dependable Japanese AUTOMATIC NH35 Seiko 3 Hand & Date Movement, Swiss self-powered ProGlo illumination system is 100X brighter than conventional lume and glows continuously for 25 years without a need to be "charged" by an external light source.