With a refreshed aesthetic and the introduction of an innovative material, the Excalibur Cobalt Blue Single Flying Tourbillon enriches Roger Dubuis' most iconic collection. Already pioneered in 2017 in the Excalibur Quatuor, cobalt chrome is a non-magnetic alloy based on cobalt, chromium and molybdenum with a high resistance to mechanical stress, corrosion and fatigue, used in surgery. Its use also in the movement (now also accepted by the Geneva Hallmark Regulation, which until 2012 only allowed the use of conventional materials such as brass, silver, steel or nickel silver) opens up the way for infinite applications, and makes this haute horlogerie piece the forerunner of a small technical revolution.
The 42 mm-diameter case has been redesigned, the bezel has a polished surface and is punctuated by 24 V-shaped engravings that are also present on the crown, which is protected by two shoulders, and the lugs are thinner and inclined to improve comfort. The RD512SQ calibre has in turn been redesigned, starting with the time train, to minimise energy wastage and is lubricated with a novel substance.
But the most important novelty is undoubtedly the flying tourbillon cage, with the lower part in titanium, to reduce the overall weight of the regulating organ, and the upper part in chrome-cobalt with a mirror finish (titanium could not have been finished with what is the finest watchmaking finish: black polishing). Another example of the Roger Dubuis philosophy of applying the latest research findings to the fundamentals of haute horlogerie.
