Variants of the Quartz-Astron, the world's first quartz watch | WatchUSeek Watch Forums
THE EARLY SEIKO QUARTZ: FROM SQ TO QZ - Montres Publiques - The vintage watch magazine
SEIKO WATCH | Our Heritage
A tribute to a watchmaking revolution. The 50th anniversary of the Quartz Astron is celebrated in a limited edition GPS Solar watch. | Seiko Watch Corporation
A Concise History of the Quartz Watch Revolution - Bloomberg
Seiko reissue of first Astron quartz, interesting price | Omega Forums
SEIKO WATCH | Our Heritage
The Seiko Quartz Watch That Broke Switzerland
Stage 3 (1960s - 1980s) | History of Seiko and Its Products | THE SEIKO MUSEUM GINZA
The Astron History | Seiko Watch Corporation
What Is The History Of Seiko? | Automatic Watches For Men
Seiko Astron: World's First Quartz Watch Turns 40 | aBlogtoWatch
The Seiko Quartz Watch That Broke Switzerland
Seiko Upgrades World's First Quartz-Powered Diver's Watch
Old Seiko Watches: History & Valuable Types to Collect | LoveToKnow
Seiko The First Vintage Quartz V.F.A. 3823-7001 in complete... for $563 for sale from a Private Seller on Chrono24
The Simple Pleasure of Seiko Vintage Quartz - A Primer in Five Watches - The Time Bum
Throwback Thursday - The world's first quartz watch - Haute Montres