The Excalibur has become Roger Dubuis’ iconic collection, and the tourbillon movement is now the brand’s specialty. Roger Dubuis has played a pioneering role in developing and refining the double tourbillon and combining it with other complications, the goal of which is optimum performance and accuracy. Coincidentally, the brand has also created one of the most design-forward timepiece collections in watchmaking. The original bears the model’s signature notched bezel and retrograde minute track and elongated Roman numerals. The watch, with an RD01 movement, is a double flying tourbillon with differential.