Vacheron Constantin ( Vacheron Constantin ) is a Geneva watch brand, founded in 1755 (Qing Emperor Qianlong two decades), founder Jean - Marc Vacheron (Rousseau's good friend). You will ask, Geneva is a Swiss city, why not say Vacheron Constantin is a Swiss brand? Because of the year Vacheron Constantin was founded, Geneva was also an independent nation (similar to today's Monaco) and it was not until 1815 that it officially became part of Switzerland. Vacheron Constantin is one of the leading watchmaking companies in Geneva , Switzerland, and has never stopped production since its founding in 262 years. Vacheron Constantin is currently a member of the Richemont brand. The world's most complex pocket watch Ref.57260 (World Watch king) is Vacheron Constantin took nine years to develop, launched in 2015, with 57 functions, only produced one. It is said that its owner is a Jewish banker in New York, the United States, the valuation of more than 100 million yuan. Vacheron Constantin in 1998 formally entered the Chinese mainland market, the cheapest watch is also more than 100,000 yuan (the price is not capped). Vacheron Constantin is an outstanding representative of the world in the top watch.