Contrary to common practice, the works are driven by two tungstenweights using an epicycloidal gear so that the clock continues to run even while being wound. The rod of the pendulum, which weighs seven kilos, is made of invar and bears an air-pressure and temperature compensator.
Les deux poids de tungstène entraînent l'horloge par l'intermédiaire d'un engrenage épicycloïdal évitant ainsi l'interruption de la marche pendant son remontage.