The Overseas perpetual calendar ultra-thin skeleton was awarded the ‘Calendar and Astronomy’ prize at the GPHG —Grand Prix d’Horlogerie de Genève— 2020. This timepiece is the perfect illustration of Vacheron Constantin’s technical and aesthetic know-how: it stands out for its contemporary design as well as for the complexity and sophistication of its ultra-thin open-worked movement which also houses a perpetual calendar.