Designed to slow-down the process of wearing out of the self-winding mechanism, the declutchable rotor is what it is: a rotor that declutches automatically from the winding barrel as soon as the estimated power reserve reaches the 50-hour mark. Being 50 mm in height and 42.7 mm in width, the watch is also 13.95 mm thick, which makes it live to its name: “tonneau” term is often referred to the huge oak barrels used in winemaking.