How to screw Longines watch manually?

1. Put the Longines watch in front, wind the right hand and turn it clockwise.

2. Turn the watch handle clockwise for 30 turns and wind it up. When screwing the crown, be sure to be light. Under normal circumstances, 30 turns clockwise will probably be full, but if you can't turn around before 30 turns, you can stop to prevent damage.

Extended data:

Common sense of manual winding of watches;

Common sense of winding 1: Nothing so-called "automatic" is unconditional. Of course, mechanical things should follow principles, and so should watches. The premise of "automatic" is that your own arm should move first. According to the principle of doing work in physics, the horizontal motion of an object does not do work (unless you jerk at an acceleration), so wrist translation can't wind up the watch.

The best way to make the watch wind automatically is to swing the arm up and down along the plane of the automatic lever, at which time the lever rotates the most, but if it swings up and down along the axis of the lever, the automatic lever will not rotate. It is a natural and random action for people to swing their arms. Any force can be decomposed into axial force and radial force, and only the radial force acting on the automatic lever can do useful work.

Common sense of winding 2: At present, automatic winding forms are also divided into one-way and two-way. The so-called unidirectional winding means that automatic winding can only be wound when it rotates in a certain direction, and it can be wound in both directions regardless of the direction of rotation. There are many automatic watches with two-way winding now. I feel that the rotation sound of the automatic tuo is louder when I am on my arm than when I am down.