The Seiko Astron celebrates its 50th anniversary

On 25th December 1969 Seiko presented its Astron quartz movement to the world The significance is hard to overstate, since the chronometer norms at the time were not yet those of the COSC but of the individual bureaux officiels that certified chronometers The standard at the time required accuracy of -1/+10 seconds per day; from 1973 the COSC required -4/+6 seconds per day.

With the launch of the Seiko Astron GPS Solar seven years ago, even those impressive figures from 1969 started to look quaint To celebrate the 50th anniversary of this legendary calibre, Seiko introduces a new movement in the GPS Solar 5X series The 5X53 Dual Time movement adjusts to a change in time zone at the touch of a button using a high-speed time zone adjustment function that spins the hour, minute and seconds hands to the correct positions independently.

The 5X53 can automatically determine 39 recognised time zones and a time transfer function also allows the wearer to switch instantly between local time and home time. . Source