Seiko Astron. The Most Advanced Ever.
Since 2012, Seiko Astron has led the world in GPS Solar technology. Today, the Astron GPS Solar collection includes a wide range of styles, all of which offer atomic-clock precision and exceptional ease of use. By connecting to the GPS network, every Seiko Astron watch adjusts at the touch of a button to your time zone and, by taking all the energy it needs from light alone, never needs a battery change.