Chronograph 6139-6002

AutomaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. day-date chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. in the Seiko 6139 family, with a 30-minute counter at six and a rotating inner ring. Executions retain the exact 6139-6002 case reference; specimen dates do not establish their complete production ranges.