Clock movements and motors are 2 equal names that refer to the engines or driving forces that make wrist watches function. "Clock movements" is the brand name and also "clock motors" is the term nonprofessionals much more commonly use. All the same, these systems regulate the rapid placements of the hands as well as the behavior of various other components.
Clock movements (or electric motors) are nowadays basically black boxes, but they user interface to the outside world via a forecasted set of concentric cylindrical shafts. Each shaft rotates separately of the others as well as connects to its very own (hour, min, or second) hand. This forecast is normally threaded to make sure that it can be connected to an instance by means of a nut.