The History of Seiko Through 12 Milestone Seiko Watches | WatchTime - USA's No.1 Watch Magazine
Seiko Watches - History, Philosophy, and Iconic Products
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
The Seiko Quartz Watch That Broke Switzerland
Variants of the Quartz-Astron, the world's first quartz watch | WatchUSeek Watch Forums
Quartz | Knowledge | Customer Service | Seiko Watch Corporation