1. Appearance. Visual inspection shell, surface, needle, no "trachoma" and scratches, bright coating, no color difference, the back cover should be tightly rotated.
2. Starting performance. Slowly rotating the upper handle and winding, while observing the second hand, generally the less times the second hand starts the upper rotation, the better the starting performance of the meter.
3. Top note. Hands feel relaxed and there is no murmur. In addition to the phenomenon of slipping on the top of the automatic watch after the foot, the general watch should be able to spring on the foot, not slipping.
4. Pull the needle. The hands feel comfortable when the needle is pulled. Too tight or too loose are not good. When the needle is aligned with 3, 6, 9 and 12 characters respectively, the minute needle should not deviate from 12 characters (+4 decibels), and the hour, minute and second needles should not touch each other.
5. Pronunciation. When the watch is fully wound, the voice should be clearly and symmetrically listened to by the ear, without murmur, and does not change with the direction.
6. Travel time accuracy. It needs special instruments to measure, some large state-owned stores have the business of testing for customers. When choosing and purchasing, salesmen can be asked to check the travel time accuracy and position error.