| 词条 | Astron (wristwatch) |
| 释义 |
|name=Seiko Quartz-Astron 35SQ |image=Seiko Astron.jpg |caption= |introduced=December 25, 1969 |type=Quartz |display=Analogue }} The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch. It is now registered on the List of IEEE Milestones as a key advance in electrical engineering. The Astron was unveiled in Tokyo on December 25, 1969, after ten years of research and development at Suwa Seikosha (currently named Seiko Epson), a manufacturing company of Seiko Group. Within one week 100 gold watches had been sold, at a retail price of 450,000 yen (US$1,250) each (at the time, equivalent to the price of a medium-sized car).[1] Essential elements included a Y-type quartz oscillator of 8192 cps, a hybrid integrated circuit, and a phase locked ultra-small stepping motor to turn its hands. According to Seiko, Astron was accurate to ±5 seconds per month or one minute per year, and its battery life was 1 year or longer.[2] AnniversariesIn March 2010, at the BaselWorld watch fair and trade show in Switzerland, Seiko previewed a limited edition new version and related designs of the original Astron watch, commemorating the fortieth anniversary in December 2009 of the debut of the Astron watch.[3] References and footnotes
1. ^The price of Toyota Corolla E10 was 432,000 yen (US$1,200) when it was released in 1966. 2. ^{{cite web|url=https://global.epson.com/company/corporate_history/milestone_products/pdf/05_35sq.pdf|title=Seiko Quartz Astron 35SQ|publisher=Seiko Epson Corporation|format=PDF|accessdate=2018-01-22}} 3. ^"The new SEIKO Quartz Astron: A demonstration of SEIKO’s four decades of dedication to the perfection of the quartz watch", {{Webarchive|url=https://web.archive.org/web/20130319105440/http://www.seikousa.com/press/2010/pdf/bsl2010_press05.pdf |date=2013-03-19 }} Seiko press release, March 18, 2010 Further reading
6 : Products introduced in 1969|History of electronic engineering|Watch models|Seiko|Seiko Epson|Japanese inventions |
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