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A tribute to a watchmaking revolution. The 50th anniversary of the Quartz Astron is celebrated in a limited edition GPS Solar watch. | News | Seiko Watch Corporation
Seiko Astron: World's First Quartz Watch Turns 40 | aBlogtoWatch
WAS THE 95GS REALLY THE FIRST GRAND SEIKO QUARTZ MOVEMENT? - Montres Publiques - The vintage watch magazine
SEIKO WATCH | Our Heritage
The Seiko Quartz Watch That Broke Switzerland
Seiko Astron 1969 Price Flash Sales, UP TO 57% OFF | www.editorialelpirata.com