Seamaster Big Blue 176.004

Seamaster AutomaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. 120 m ChronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display., the first automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. diving chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display.: helmet-shaped case milled from a solid block (about 47 mm wide with crown, 52 mm long, 17 mm thick, 176 g), blue dial and , 1040 with orange arrow-tipped central minute hand, date at three, 12-hour counter at six and 24-hour indicator at nine.