at last, a watch that adjusts to all 39 time zones on earth. 39 dedicated to perfection ASTRON. By developing a low-energy-consumption GPS receiver, Seiko has created a watch that connects to the GPS network and uses it to identify both time of day and time zone. The new Astron recognises all 39 time zones on earth and, by taking all the energy it needs from light alone, never needs a battery change. seiko.be