Quartz: A mineral with a highly regular molecular vibration rate. Quartz is used in watches as its vibrations can be harnessed to control the output with great accuracy.
Quartz movement: A movement powered by a quartz crystal to. Quartz crystals are very accurate. They can be mass produced which makes them less expensive than most mechanical movements which require a higher degree craftsmanship.
Quick set/date: A movement that allows the date to be set directly from the crown of the watch rather than the rotation of the time.
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7.12.08
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