This year at the SIHH 2017, Vacheron Constantin took the show with one of the most impressive wristwatches we've ever seen. One of the most complicated and exceptional wristwatches ever produced is the new Vacheron Constantin Les Cabinotiers Celestia Astronomical Grand Complication ref. 3600 Unique Piece. This timepiece that is beyond impressive, took five years to develop all the way from scratch, along with two years of design by one dedicated master watchmaker at Vacheron Constantin.