The beautiful Caliber 2450 can be seen from the back.
vacheron constantin Silver 18K White Gold Patrimony Contemporary Date Self Winding WG 85180/000G-9230 Watch 40 mm. It is armed with a completely in house movement caliber 2450Q6 that has obtained the Geneva Seal and the case is a slim and sleek.The Patrimony is a model that can be called a legacy in Vacheron Constantins long history.