Seiko Astron SSH021 GPS Solar Quartz Dual Time Stainless Steel Black Dial prospex Crown Type: Screw-Down

Crown Type: Screw-Down

the other featuring measurement scales and an exhibition movement

Strap reference H6000001121

Movement: Quartz movement J645

The case and bezel have mirror finishes that enhance the texture of the metal

Seiko Astron SSH021 GPS Solar Quartz Dual Time Stainless Steel Black Dial prospex Crown Type: Screw-DownToday, 50 years after the Seiko Quartz Astron ushered in the quartz revolution, the enduring popularity, ubiquity and versatility of this remarkable technology have all been proven beyond any expectation. The Quartz Astron changed the way the world told time, astonishing people with its accuracy of +5 to 5 seconds per month. It also shaped the whole future of the electronics industry as several of its inventions, including the tuning fork shaped