A mechanical watch has a spiral. When people wind the watch, the helix is also tightened. When the helix is released, it starts to drive the movement of the watch core. A major disadvantage of mechanical watches is the inconsistency of the spiral movement speed, which leads to a decrease in timing accuracy. Accuracy is also affected by factors such as temperature, location, wear of parts and other factors. Therefore, when a mechanical watch has an error of 15-30 seconds in a day, it can be regarded as normal. The smallest error can reach only 4-5 seconds.
A quartz watch uses a battery as an energy source. The battery outputs electrical energy to the electronic block and motor in the watch. The electronic block outputs a pulse wave to the motor every second, and the motor drives the hands of the watch to run. Because the quartz crystal can provide the most stable pulse wave, it can guarantee the highest accuracy (in general, the monthly error is between 15-25 seconds ; the smallest error is only 5 seconds a year ) . Because there is a quartz crystal in it, the watch is also named Quartz Glashütte. In addition, a battery can work continuously for several years, so there is no need to wind up such a watch. Under normal circumstances, mechanical watches are much more expensive than quartz watches. At this time, because mechanical watches require precise manual adjustment of time during their production process, quartz watches are usually assembled on an automatic production line.