1. After the watch is used for a long time, dust and oil stains will fall into the handle tube, resulting in inflexible key movements. If this is the case, drop alcohol around the button, and then press or rotate the button continuously to discharge the stolen goods.

2. The keys are rusted all around, so they can't be converted if they are used frequently. At this time, it is necessary to take out the watch movement and carefully clean the buttons to make them flexible and reliable.

3. The watch is bent and deformed due to landing or collision, so that the button is stuck or the stroke is shortened. At this time, push out the cotter pin, take out the button and use it after plastic surgery.

Matters needing attention

1. When disassembling the movement, don't touch the mirror with your fingers.

2. When the movement is removed, the watch case faces down and the watch case enters dust.