Abstract: A timer includes a pointer settable to a predetermined position representing a desired time interval. Upon actuation of the timer, the pointer runs from the predetermined position to a zero position, the timer being automatically stopped when the pointer reaches the zero position. In order that the timer may also be used as a stop watch or program timepiece, it is also provided with a switch mechanism for selectively changing the direction of travel of the pointer so that the pointer runs away from the zero position and a manually actuable stop lever for stopping the timer.