men's mechanical watch, 41mm fashion classic business model, stainless steel waterproof calendar folding button, Slivery;brown

a mechanical watch is different from a quartz watch in that the second hand of a mechanical watch moves continuously. because the mechanical watch movement is complex, the travel time error is generally allowed within the range of ±45 seconds fine workmanship, easy to use, winding can walk for more than 36 hours., the movement has long service life. the appearance is thicker than quartz watch.syi