Quartz watch without battery 1988

Quartz watch without battery 1988…

After 1988, the batteries were replaced by a dynamo, a hyperminiaturized generator: the Jean d'Eve system, Switzerland, then the Seiko AGS system and finally the kinetic system also launched by Seiko in 1995. 

 To all these pioneering inventions can be added thousands of derivative inventions that have appeared for well-defined purposes: to teach children to read the clock and to reach the clock for the blind that says in words the hour and the minute.


Don`t copy text!