1500 classic automatic mechanical movement men's watch 904l stainless steel strap men's 40mm women's 34mm waterproof watch, Slivery;brown

the second hand of a mechanical watch runs continuously without interruption. the watch should be maintained every 1 to 3 years, the waterproof components should be replaced, the time function and power consumption of the movement should be checked, do not put the watch near magnetic objects, so as not to be magnetized when adjusting the time, keep the watch hand rotating clockwise and try not to let the watch hand rotate counterclockwise. the same is true for adjusting the calendar to avoid damage to the movement..syi