The Double Chronograph is also known as a Rattrapante Mechanism, Doppelchronograph, or a "split second" timer. This complication has two seconds hands. An additional push button allows one seconds hand to be stopped, to observe a lap time, for instance, while the second seconds hand continues. A second push of the button makes the stopped seconds hand catch up with the continuing seconds hand. "Rattrapante" is the French term for this "catching up" of the temporarily stopped hand.