The appearance of the watch can be inspected from the outer shell, the mirror, the dial, and the hour, minute, and second hands. The case should be free of blisters and obvious scratches, with symmetrical edges and corners. The screw joint between the back cover and the upper shell should be tight. The two watch rings are at the same distance from the case. The hole for installing the ear ring should be centered on the foot of the case.
The table mirror should be free of defects and scratches, transparent and bright. The three pins are installed correctly. There should be a correct safety gap between the needle and the needle, between the mirror and the dial. The dial and hands are coated with good finish and no spots. The dial scale lines or luminous dots are complete. There is a gap of about 0.1~0.3mm between the handle and the case.
Normal watch winding should be easy. When you turn the head to wind up, it feels looser first, and gradually gets tighter and tighter. When the handle cannot be turned forward, it means that the mainspring is fully wound and the winding mechanism is working normally. If there is an abnormal sound of “chattering” when turning the crown to wind the winding, or the top gear slips, it means that the winding mechanism is malfunctioning.
The watch should be flexible, reliable and even when the hands are adjusted. The inspection should focus on the tightness of the frictional fit between the minute wheel and the center axle. When setting the needle, if there is no feeling of looseness or tightness. It shows that the friction of the minute wheel is normal and the oil is added appropriately. On the contrary, the needle setting mechanism is faulty.