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- Astron_(wristwatch) abstract "The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch, i.e., one based on a quartz crystal oscillator. 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). Essential elements included a quartz crystal oscillator (8,192 cyles/second), a hybrid integrated circuit, and a miniature stepping motor to turn its hands. The Astron was accurate to ±5 seconds per month, or one minute per year.".
- Astron_(wristwatch) thumbnail Seiko_35A.jpg?width=300.
- Astron_(wristwatch) wikiPageExternalLink 05_35sq.pdf.
- Astron_(wristwatch) wikiPageExternalLink seiko.html.
- Astron_(wristwatch) wikiPageExternalLink 1969-seikos-breakout-year.
- Astron_(wristwatch) wikiPageID "9865334".
- Astron_(wristwatch) wikiPageRevisionID "544713990".
- Astron_(wristwatch) display "Analogue".
- Astron_(wristwatch) hasPhotoCollection Astron_(wristwatch).
- Astron_(wristwatch) introduced "1969".
- Astron_(wristwatch) name "Seiko Quartz-Astron 35SQ".
- Astron_(wristwatch) type "Quartz".
- Astron_(wristwatch) subject Category:1969_introductions.
- Astron_(wristwatch) subject Category:History_of_electronic_engineering.
- Astron_(wristwatch) subject Category:Seiko.
- Astron_(wristwatch) subject Category:Seiko_Epson.
- Astron_(wristwatch) subject Category:Watch_models.
- Astron_(wristwatch) type Artifact100021939.
- Astron_(wristwatch) type Device103183080.
- Astron_(wristwatch) type Instrument103574816.
- Astron_(wristwatch) type Instrumentality103575240.
- Astron_(wristwatch) type MeasuringInstrument103733925.
- Astron_(wristwatch) type Object100002684.
- Astron_(wristwatch) type PhysicalEntity100001930.
- Astron_(wristwatch) type Timepiece104437953.
- Astron_(wristwatch) type Watch104555897.
- Astron_(wristwatch) type Whole100003553.
- Astron_(wristwatch) comment "The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch, i.e., one based on a quartz crystal oscillator. 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.".
- Astron_(wristwatch) label "Astron (montre)".
- Astron_(wristwatch) label "Astron (wristwatch)".
- Astron_(wristwatch) sameAs Astron_(montre).
- Astron_(wristwatch) sameAs m.02pv87l.
- Astron_(wristwatch) sameAs Q2868584.
- Astron_(wristwatch) sameAs Q2868584.
- Astron_(wristwatch) sameAs Astron_(wristwatch).
- Astron_(wristwatch) wasDerivedFrom Astron_(wristwatch)?oldid=544713990.
- Astron_(wristwatch) depiction Seiko_35A.jpg.
- Astron_(wristwatch) isPrimaryTopicOf Astron_(wristwatch).