1.Mechanical watch meets the following standards before delivery: day difference within 30 seconds, hairspring swing within 200 ° -300 °, hairspring polarization within 1MS, normal parameter is 21600
2. Test water resistance according to each watch model, including 30 meters, 50 meters, 100 meters
3. Check whether the watch functions, pointer items, calendar items, month items, and supporting functions are working properly.