Blancpain 1735 Grande Complication – $800,000

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Released in 1991, Blancpain’s 1735 is all the more impressive because it was developed when modern computer-aided watchmaking techniques were still in their infancy. The complication luminary Dominique Loiseau added a tourbillon and moon phase to the traditional combination of perpetual calendar, minute repeater, and (in this case, split-seconds) chronograph, all in an integrated and remarkably slim movement. In many ways, the design—30 examples of which were produced—stood without equal in the world of wristwatches for more than a decade. (blancpain.com)