MASTOP Men's Automatic Mechanical Watch with Date Moon Phase & 24-Hour Display - Genuine Calfskin Leather Strap, Transparent Skeleton Design (Brown) - Perfect for Business, Formal Events & Luxury Gift Giving

Watches of brand was established in the early twentieth century in 1986, adhering to the brand concept of "precision to create a legend" , breaking the traditional mature classic watches for the mainstream situation, open up new classic,fashion style. watch is the pioneer of high-end watch industry,There are more than 160 countries have sales network and service agencies, We control quality successfully,based on top-of-the-line testing and extensive expertise.. What can I do when the watch stop? Fully winding up spring need be turn the crown clockwise 30-40 rounds to start the watch and give it some reserve power， Self-winding automatic movement watch needs to wear every day (for about 8 to 12 hours a day)， The Automatic Wrist Watch is wound by the motion of the wearer's arm，that is wound by wrist morements thanks to the rotor， this device winds the watch's mainspring automatically using the natural motions of the wrist, with a rotating-weight mechanism. If an automatic watch is not worn for a day or two, Or the natural movement of the wrist is very small,it will wind down and need to be Supplementary winding by hand to get it started again,turning a Crown winding attached to a ratchet which twists the mainspring tighter,Energy is stored in the mainspring manually by winding it up. A separate set of gears called the keyless work winds the mainspring when the crown is rotated, and when the crown is pulled out a short distance allow the hands to be turned to set the watch. We will try our best to provide you with good service. If you have any question, please kindly contact us, we will reply you within 24 hours..

Complications mechanical watch：provides the various in dications of the conventional calendar such as the date,the date,the week,the month and the moon phase of 24 hours

Men's Mechanical Watch:Self-winding automatic movement . Powered by everyday movement of your arm

Polished 316L stainless steel case /Diameter:41mm ,thickness:12mm

Stainless steel watch:Stainless steel water proof case cover make it super durable,Stainless steel push button clasp make it easy to put on or take off,provide convenient and comfortable wearing experience

Water resistant up to 3 ATM （Suitable for everyday use. Splash/rain resistant.NOT suitable for diving, swimming, snorkeling, water-related work）Too much water contact WILL DAMAGE THE LEATHER BAND STRAP.