A watch with hands showing the hours, minutes and seconds, but which also features a mechanism for measuring continuous or interrupted units of time, from a fraction of a second to twelve hours. This supplementary mechanism is operated manually by push-pieces that set in motion, stop and return the hands to zero. The chronograph hand or seconds-hand indicates seconds, fifths of seconds or tenths of seconds. Counter hands total minutes and hours. Thanks to digital display and quartz movements seconds can even be divided into hundredths and thousandths.