Last Sunday May 14th, 2017, this Rolex Triple Calendar ref. 6062 a.k.a 'Bao Dai' from 1952 sold at the Phillips Watches Geneva Watch Auction FIVE for $5.1 Million USD making it the most expensive Rolex ever sold at auction. But what makes this watch so valuable and special? Well, it is all about its provenance. Following the Indochina war in 1954, the world powers meet in Switzerland to negotiate with the Viet Minh on the future of Vietnam.