Hotportgift Steampunk Classic Elegant Men's Dress Style Skeleton Mechanical WristWatch A mainspring that stores mechanical energy to power the watch .A gear train, called the going train, which has the dual function of transmiting the force of the mainspring to the balance whel, and adding up the swings of the balance wheel to get units of seconds, minutes and hours, etc, A separate part of the gear train called the keyless work allows the user to wind the mainspring and enables the hands to be moved to set the time A balance wheel which oscillates back and forth. Each swing of the balance wheel takes precisely the same amount of time. This is the timekeping element in the watch. An escapement mechanism which has the dual function of keeping the balance wheel vibrating by giving it an impulse each seing,and allowing the clock's gears to asvance or"escape"by a set amount with each swing. it is this part that produces the characteristic"ticking" sound of the mechanical watch. An indicating dial, usually a traditional clock face with rotating hands, to display the time in human-readable form.