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Summary
| Description |
Deutsch:
Erstes Quarzarmbanduhrwerk Kal. 35A, Nr. 00234, Seiko, Japan, 1969 (Deutsches Uhrenmuseum, Inv. 2010-006)
English:
First quartz wristwatch movement, used in the Seiko Astron, Caliber 35A, Nr. 00234, Seiko, Japan, 1969 (German Clock Museum, Inv. 2010-006). Essential elements included a XY-type quartz oscillator of 8,192 Hz (8,192 = 2
13
), a hybrid
integrated circuit
, and a phase locked ultra-small
stepping motor
to turn its hands. According to Seiko, it was accurate to ±5 seconds per month or one minute per year, and its battery life was 1 year or longer.
[1]
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| Date | |||
| Source | Deutsches Uhrenmuseum | ||
| Author | Museumsfoto | ||
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Permission
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- ↑ Seiko Quartz Astron 35SQ . Seiko Epson Corporation. Retrieved on 2018-01-22 .