Seiko Markets Quartz Watch
Revision as of 20:35, 23 February 2012 by Administrator1
This article is a stub. Please help expand the article by using the edit tab. first commercial quartz wristwatch, was introduced in Tokyo on December 25, 1969. Accurate to within five seconds per month, its crucial elements included a quartz crystal oscillator, a hybrid integrated circuit, and a miniature stepping motor to turn the hands.