White shell rose gold new upgraded version of Vacheron constantin classic beauty appreciation Vacheron Constantin heritage retrograde calendar watch model 4010U/000R-B329. The panel design is unique, the function is simple and practical. It uses self-made Cal. R31L/1 movement with a diameter of 42.5 mm. With Original Italian cowhide buckle, more comfortable to wear, simple and refined yet elegant, classic heritage that will never go out of style.