SEIKO ASTRON 5X53シリーズ シリアル891034 時計,The Astron GPS Solar KOJIMA PRODUCTIONS Limited Edition. In 2021, Seiko teams up with KOJIMA PRODUCTIONS to create an Astron watch that fuses the Dual-Time 5X53 Caliber with a design inspired by,SEIKO ASTRON GLOBAL LINE 5X SERIES GPS SOLAR SBXC053 MADE IN JAPAN JDM,Seiko Watch Corporation,Seiko presents the first Astron GPS Solar watch to combine Dual-Time technology with a chronograph function.