One of the beautiful things about a mechanical watch is that is requires interaction with its owner to function. That coiled mainspring will only provide power for a day or two (or sometimes longer) if you don’t keep it wound. The automatic, or self-winding, watch, functions as its name suggests.
As long as you're wearing it, the mainspring maintains tension thanks to the weighted rotor in the movement that oscillates with your arm's movements, ensures a constant power supply to the watch. A slipping clutch mechanism is incorporated to prevent the spring from becoming overwound, providing optimal functionality. Therefore, unless you lead a sedentary lifestyle or don't wear your watch regularly, you won't need to manually wind your automatic timepiece. However, if the need arises, simply give the crown 20 or 30 spins until the seconds hand begins to move, proceed to set the time, and securely strap it onto your wrist for a hassle-free experience.
