This new version of the 5X solar-powered ASTRON GPS adjusts the time zone via GPS in just 3 seconds. This model, whose case resembles the shape of the first Seiko ASTRON quartz watch from 1969, is slightly smaller than its predecessors ASTRON 5X, with a diameter of 41.4mm. With all the typical functions of the 5X caliber and its unmatched reliability, this timepiece is a real must for anyone who loves watchmaking technology