Exhibitor: Okada Kazuyo
Writing back from Japan trip!
Seiko Quartz Aston 355Q
The world's initial quartz crystal wristwatch. Using the quartz crystal oscillator as the controlling element, miniaturization of even the wristwatch was succeeded upon development of oscillation, frequency dividing, driving, hybrid ICs for the circuit and the distributed stepping boards and thereby, such high precision as daily variance of plus minus 0.2 second was achieved!
Exhibitor: Okada Kazuyo
Writing back from Japan trip!
Article Seiko Quartz Aston 355Q is published by Andrew on Friday, May 18, 2012. 0 comments: in post Seiko Quartz Aston 355Q
Exhibitor: Okada Kazuyo
Writing back from Japan trip!
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