CASE WIDTH Diameter 42mm, 15.3mm thick, 49.5mm lug to lug, brushed & polished steel case. BACK Brushed steel, 2.3mm thick. CRYSTAL Domed sapphire crystal, 4.2mm thick with anti-reflective coating. WATER-RESISTANCE 500 meters. MOVEMENT Seiko NH35 automatic movement, 24 jewels, power reserve 41 hours. FUNCTIONS Hours, minutes, seconds & date at 3 o'clock. BEZEL Brushed & polished steel with dark blue ceramic insert. Anti-clockwise rotating bezel with diving scale. CROWN Brushed & polished steel. DIAL Black burst with lume hour markers. STRAP Brushed finishing 21mm steel bracelet.