Seiko astron watch gps solar chronograph bracelet no watch on earth could better express kintaro hattoris vision that seiko watches should always be one step ahead of the rest to add a chronograph and an electronic setting function in the crown all in a smaller case size demonstrates that astron is redefining the industrys idea of what a watch can deliver this watch sets a new world standard in electronic watchmaking caliber specifications 8x82 gps solar chronograph gps controlled time