The Seiko Guy on Instagram: "Quartz-Astron 35SQ (35-9000), the world's first quartz wristwatch introduced in December of 1969. #seiko #quartzastron #seikoastron #35sq #watch #seikowatch #vintageseiko #watchesofinstagram #orologio #reloj #relojes ...
Seiko Astron: World's First Quartz Watch Turns 40 | aBlogtoWatch
Reasons for choosing Seiko Astron | Seiko Watch Corporation
Seiko Astron gold case finish comparisons — Plus9Time