Quartz is a kind of white oxide. Its major composition is silicon dioxide (sio2).Quartz will shock when it is placed on vibrating circuit. In certain conditions, quartz can pass its frequency to the circuit. If applying this feature to the quartz movement combining with resistors and capacitors, we can transform electrical energy into power through the quartz oscillator to produce circuit boards with mechanized equipment. In this way, we can make watch movement. It is accurate and light and can be maintained easily. However, generally speaking, the life of battery of a quartz watch is only one or two years. You need to replace battery often. In addition, the watch’s working principle is the use of quartz oscillation.  After 5 or 8 years the quartz oscillation will recess, so the accuracy will be reduced relatively. At this time you shall change your watch. But with the development of modern industry and high labor costs, using manual methods to facelift so many small parts isn’t worthy. Therefore, the factory usually asks their customers to change a new movement when quartz watch have big problem.

Mechanical watch generally can be classified into the following two types: manual winding watch and automatic watch. Their mechanical power comes from the winder in movement which can turn the gear wheel and keep the hand moving. But the way of power sources is different. If it is a manual winding watch you need to wind it with hands. The manual winding movement is thinner than the automatic movement. So the whole watch is lighter relatively. But for the automatic watch, the automatic plate in the bottom of movement swings from one side to another to drive wind. And it is thicker than the manual winding watch. The advantage of mechanical watch: By regular maintenance, you can use a very long time. But the accuracy is declined because of watches’ different quality and effect of gravity. Mechanical watch difference is usually based on the number of seconds in a day while the quartz watch is based on the monthly deviation.

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