The quartz movement was introduced by Seiko in 1969.
This revolutionary movement was electronic and made its mechanical predecessor technically obsolete in almost every way:
-Requires very little maintenance
-Here’s how they work:
In quartz movement watches, the mainspring is replaced by a battery.
This battery sends an electrical current through the quartz crystal, electrifying it and causing it to vibrate (more than 30,000 times per second).source These vibrations power the motor that drives the watch’s hands and other functions.