Seiko Astron Watch Solar GPS SSH021J1. The executive sports series brings more to Astron than a dynamic new look; this GPS Solar watch is for active people who would like durability and precision with a dash of style. Like all Astron watches, it connects automatically to the GPS network and, at the touch of a button, adjusts to the local time anywhere on earth with a precision of 1/100,000th second, using just the power of light. The executive sports series features the 8X53 caliber which also offers a dual time sub dial with an AM/PM indicator.