The keyless worksKeyless Works The keyless works is the mechanism in a mechanical watch movement that allows the wearer to wind and set the time by turning the crown (and without the use of a key, which was needed way-back-when). It is a set of gears, levers, and clutches that control the winding and setting functions of the watch. The keyless works is connected to the winding mechanism, which winds the mainspring, and to the motion works, which sets the time. [Learn More] is the mechanism in a mechanical watch movement that allows the wearer to wind and set the time by turning the crownCrown The knob on the outside of the watch that you typically use to either wind the mainspring or set the time [Learn More] (and without the use of a key, which was needed way-back-when). It is a set of gears, levers, and clutches that control the winding and setting functions of the watch. The keyless works is connected to the winding mechanism, which winds the mainspringMainspring The mainspring is a spiral-shaped metal spring that stores energy in a mechanical watch movement. It is located inside the barrel. The mainspring is wound, either manually or automatically. The mainspring unwinds over time, and the watch will stop running when the mainspring is fully unwound. [Learn More], and to the motion worksMotion Works The motion works are the gears and levers in a mechanical watch movement that are responsible for translating the rotary motion of the going train into linear motion for the hands of the watch. They are connected to the center wheel or the fourth wheel and the motion works gears are responsible for the motion of the hour and minute hands. [Learn More], which sets the time.