This is the feature that displays the discrete jumps between seconds. Most mechanical watch’s second hand moves every second but watches with this function do not run the same. Watches with this function are far more mechanically complex. The seconds hand will have to move in every vibration of the balance wheel. This means that the hands will move 5 times every second. To achieve the dead seconds function, there is a need for extra mechanic work to reduce the rate from 5 to 1 per second.