How to know the watch you wear keeps accurate time? Here are three ways.
1. If the time your watch shows is basically the same with the time from the radio, and this situation happens every few days, then you can define your watch as a accurate watch.
2. At first the watch keeps the same time with that of radio. But it works with error every day. If the time error is the same every day and the time error doesn’t exceed the quality standards of the watch. Then it is a qualified watch. If the error exceeds the standards, you can adjust the time to make it accurate.
3. If your watch goes irregularly either faster or slower than the radio time, but the time error is very subtle, it is still a qualified watch. But if you find the time error is big and has no regularity and you can adjust it back to the accurate time, then you should send it for repairing.
