الوصف

Watch is a timing device,is measuring and indicating the time precision instruments.Watch is usually less than machine size difference.According to international practice,the diameter of movement more than *0 mm,of a thicness exceeding *0 mm for the bell;*7 to *0 mm in diameter,thickness 4 to 6 mm,said for pocket watches;diameter *7 mm below to watch;diameter of not more than **4 square mm,said for the female form.The smallest,most strong,the most sophisticated mechanical one.