4000E/000A-B439 Vacheron Constantine Fiftysix Calendar Stainless Steel Silver dial. Round Stainless Steel case Stainless Steel bezel. Silver dial Gold Applied indexes Sapphire crystal. Automatic movement, Time, Day, Date, Month, Moon Phase s complications. 40H power reserve 40mm diameter 11.6mm thick. Alligator strap Deployment Buckle buckle. 30m water resistant Pull Out crown Exhibition case back. Founded in 1755 by Jean-Marc Vacheron, Hallmark of Geneva. 260 Years of History. Exceptional Collections, Historiques Collection, Patrimony Collection, Overseas Collection. an independent watchmaker in Geneva, Switzerland. Jean-Marc Vacheron, Abraham, took over the family business in 1785. Later, in 1810, Jacques-Barthélemy Vacheron, the grandson of the founder, became the head of the company. In 1819 François Constantin became an associate of Vacheron. The company continued its activity under the name Vacheron & Constantin. François Constantin traveled around the world and marketed watches. The company’s motto “Do better if possible and that is always possible, ” first appeared in Constantin’s letter to Jacques-Barthélémy.