2) For a watch that is not wound or stopped, slowly turn the handle to observe the start of the second hand: the less the handle turns, the earlier the second hand starts, which means the higher the sensitivity of the watch; On the contrary, the sensitivity is low or the instrument has other faults. However, it should be noted that, due to the greater stiffness of the hairspring, a fast-swinging watch needs a little more wind-up to swing than a watch with a traditional frequency (18000 times/hour). A watch with high sensitivity can go on for a long time after the last winding.
Check the spacing and position of the hands. There should be a certain distance between the pointer and the mirror, the dial and the three hands, otherwise they will collide with each other and affect the normal operation of the watch machine. When checking, you can observe it by pulling the needle. Check whether the position and mutual cooperation of the hour hand and the minute hand are normal: set the minute hand and the hour hand at 3 o'clock and 9 o'clock, and observe whether the two hands are at right angles; Dial to 6 o'clock, whether the two needles are in a straight line; Dial to 12, whether the two stitches coincide.
Check watch winding device
The winding of an ordinary watch should be easy. When winding the handle, it feels very loose at first, and gradually it becomes tighter and tighter. When the handle can't rotate forward, it means that the spring is fully loaded and the winding mechanism works normally. Is there a "chirp" sound when turning the handle? Abnormal noise or sliding of the top teeth indicate that the winding mechanism is faulty.