Greubel Forsey Différentiel d’Égalité Watch

Greubel Forsey’s innovation in the Différentiel d’Égalité started with constructing a remontoire, which is an additional spring along the gear train that evens out the energy that is delivered and acts as a secondary source of energy. The steady flow of energy maintains a constant balance amplitude throughout the entire power reserve and because the remontoire is combined with a differential, it eliminates the disturbance to the balance wheel during the rewinding every second. Limited to 33 pieces.