A watch operated by vibrations of an electrically driven quartz crystal.
- A quartz watch on the other hand features electronic circuitry that has a limited lifespan.
- An automatic or mechanic watch uses an engine that is powered by a spring (the automatic is also self winding); a quartz watch is powered by a battery that needs replacement once every two years.
- The Swiss failed to patent or market the quartz watch, even though they invented it, because they couldn't shift paradigms.
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