To add to his accomplishments in the field of watchmaking, Pierre Kunz has dispensed with convention and created an unusually large aperture format, or “grand guichet" displayed on a 3 millimetre aperture to ensure perfect legibility. Pushing back the frontiers of the possible, Pierre Kunz designed a genuine technical innovation with the eye of the artist. Its special features are the double retrograde seconds superposed on a single axis, where each hand chases the other indefinitely and the retrograde days function occupies a central position. This “Grande date” model can be equipped with a power reserve on the base indicating precisely how long it has left to run. It was designed using a satellite system that gravitates around the movement. The only system of its kind in the world, this power reserve inscribed on an engine-turned zone is perfectly integrated in the open back cover assembly of the watch.