Who has not yet heard of the Excalibur? This mythical sword has been said to pronounce Arthur in kingship, being the only one whose heart was pure to take the sword out of the heavy stone it was thrust in. Such legend is the same concept of Roger Dubuis' Excalibur series; something iconic, extravagant and powerful. And now, the brand has delivered a fresh new model with the Quatuor Cobalt MicroMelt—not just a singlehanded warrior, but a three-piece collection that will surely send ripples across the watchmaking world.

The Roger Dubuis Excalibur Quatuor Cobalt MicroMelt boasts of something the world has rarely seen: cobalt chrome. Dressed like a fine warrior, this 48mm diameter watch is imposing on its own. The cobalt chrome alloy material makes use of an exclusive Micromelt technology, representing a rare 0.1% of the global metallurgy. This material covers the case, bezel, caseback and crown.

In order to produce such a rare surface, the powder is mixed and filtered to a controlled diameter and are then poured into sealed canisters. Here, the alloy is subjected to a method of hot isotsatic pressing to achieve denseness, before again being heated to produce hot rolled bars. Roger Dubuis successfully improved the chemical homogeneity of the cobalt chrome, which in turn gives the brand controlled porosity which stabilizes its quality. However, it must be said that in taking risks to such aesthetic and technical forays, the wearers should also be taken in mind. Thus, Roger Dubuis implemented the passive protective 1m, which offers 100% biocompatibility and corrosion resistance. This is produced due to the multiphase structure of the alloy, plus the precipitation of carbides.

If you think the physical attributes of Roger Dubuis Excalibur Quatuor Cobalt MicroMelt is astounding, wait till you get to the inside. At the heart of this magnificent watch is a hand-wound 590-part RD101 Quatuor movement, a progressive complication that vibrates at a frequency of 11,200 vph. It comes with four spring balances and five differentials—an outtake which makes it fast and efficient, achieving the same effect as a tourbillon by compensating for the rate variations caused by gravity.

In the newest interpretation of the Excalibur Quatuor, the gleaming cobalt chrome shines in contrast with the bluish PVD coating upon the movement barrel cage, bridges, dial, hour markers and the alligator leather strap. Red and white accents add a touch of glamor, added with the speedometer styled minute track and white gold skeleton hands.

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