In the wake of the Vacheron Constantin reference 57260 and its 57 complications presented in 2015, the Les Cabinotiers Armillary Tourbillon Piece Unique highlights two emblematic functions for the oldest watchmaking manufacture in the world. Equipped with a bi-axial armillary tourbillon with spherical balance-spring and an instantaneous retrograde display of the hours and minutes in an arch between 12 and 6 o’clock, this timepiece is an exceptional horological structure like no other.