The Seiko Quartz Astron-35SQ watch is the first quartz watch in the world, using a quartz oscillator.
It is on the list of the IEEE Milestones grouping together the major advances in electronic engineering.
The Astron was unveiled on In Tokyo after ten years of research and development in Suwa Seikosha (currently Seiko Epson), a Seiko group company . In less than a week 100 gold watches were sold at a retail price of 450,000 yen ( 1,250 US $ ) which at the time represented the equivalent of the price of an average car 1 .
Essential elements include a quartz crystal oscillator ( 8 192 Hz ), a hybrid integrated circuit and a small motor. The accuracy of the Astron is in the order of ± 5 seconds per month, or one minute per year.
In March 2010, Seiko presented a limited edition commemorating the fortieth anniversary of Watch 2 at Baselworld .
Notes and references
- ( In ) This article is partially or entirely from the article in English entitled ” Astron (wristwatch) ” ( see the list of authors ) .
- ( In ) ” IEEE History Center: Electronic Quartz Wristwatch 1969 ” [ archive ] , IEEE
- ( In ) ” Seiko Quartz Astron 35sq December 1969: The Quartz Watch That Revolutionized horological history ” [ archive ] , Seiko Epson
- ( In ) ” The Watch Horological That Changed History ” [ archive ] , Seiko Epson ( Alternative Version [ archive ] )
- ↑ The price of the Toyota Corolla E10 was 432,000 yen ( 1200 $ ) to its release in 1966.  [ archive ]
- ↑ “The new SEIKO Quartz Astron: A demonstration of SEIKO’s four decades of dedication to the perfection of the quartz watch” [ archive ] , Press release Seiko, March 18, 2010