Seiko astron watch gps solar watch sast015gseiko astron watchesunderstand time zones at last the search for totally precise time everywhere on the planet is over by developing our own patented low energy consumption gps receiver seiko has been able to create a watch that can receive gps signals and identify time zone time and date data using the global network of gps satellites it recognizes all the 39 time zones on earth this breakthrough timepiece is called seiko astron like its