@konstantinchaykin: In record-breaking ultra-thin watches, even something as routine as winding the movement or setting the time calls for a special solution. It might seem that a separate external device would be unavoidable. But ThinKing Mystery takes a far more elegant approach: a miniature winding key is concealed inside the strap clasp. Simply slide back the protective slider, use the key, return it to its place and secure it again. Everything needed to wind the watch and set the time is therefore always, quite literally, close at hand.