wristwatch 40mm collection moonphase 7750 movement l2.673.4.51.6 mechanical automatic black leather strap fashion men's luxury watches, Slivery;brown

winding: the internal function of the new mechanical watch is almost zero, and it needs to be manually wound before wearing it for the first time stainless steel is resistant to falling but not abrasion-resistant, so small wear marks are prone to appear adjust the calendar: please do not actively adjust the calendar between 22.00~2.00, this may cause damage to the movement after receiving the watch, you should rotate it anticlockwise, and then rotate it clockwise for 30 cycles to reserve energy for normal operation..syi