A regulator, or regulating organ, is a mechanical device found in watches and clocks that is responsible for controlling the rate of the timepiece. The regulator, often made up of a balance wheel and an escapement, is responsible for making sure the watch or clock keeps accurate time by controlling the speed of the oscillation of the balance wheel. Regulators can be found in both manual and automatic watches and come in a variety of styles and sizes. They are an essential part of a timepiece, and help ensure that it keeps accurate time.
