Vacheron Constantin unveiled the Overseas Ultra-Thin Perpetual Calendar at SIHH 2016. The watch runs on the self-winding caliber 1120QP, boasting a perpetual calendar function. Recently, the collection welcomed the Reference 4300V/120G-B946 in 2021. The skeletonized caliber 1120 QP SQ is encased in elegant White Gold. This model comes with a bracelet and two different straps - one in rubber and the other in alligator leather.