316l surgical grade stainless steel case; miyota 8215 jewel automatic movement; jewelry bearings: 21 stones; 42-hour power reserve; beats per hour (bph): 21,600 / hour; mineral crystal covered with sapphire; caseback observation to see movement; unidirectional bezel; screw-down crown; 316l surgical grade stainless steel bracelet; folding push-button deployment clasp with engraved logo; luminous hands; date display; case diameter 50 mm; 20 atm water resistant professional diver;