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What is the allowable error range for Swiss watches

What is the allowable error range for Swiss watches

Firstly, it should be understood that the vibrating body of a quartz watch is quartz, which has a fixed vibration frequency and determines the vibration period. The period is the time of one vibration, so a quartz watch is more accurate because its vibration frequency is fixed. And for mechanical transmission, the power comes from the spring, which can cause unbalanced errors in mechanical transmission due to factors such as gravity, magnetic field, and metal fatigue. Therefore, it is normal for mechanical watches to have certain errors.

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