Roger Dubuis Excalibur Quatuor Cobalt MicroMelt ®

For its latest timepiece from Excalibur Collection, Roger Dubuis incorporates an innovative material: cobalt chrome.

This high-performance cobalt chrome alloy clothing the 48 mm-diameter case, bezel, case-back and crown is produced using the extremely exclusive MicroMelt® technology that represents just 0.1% of worldwide metallurgy. Widely associated with aeronautics and astronomy, this process involves melting and atomizing the alloy into a fine powder by introducing the molten metal to a high-pressure stream of gas using a dedicated vacuum induction melting gas atomization unit.

In this bold, fresh interpretation of the Excalibur Quatuor, the gleaming cobalt chrome makes a pleasing contrast with the blue PVD-coated movement barrel cage and bridges, as well as the dial, hour-marker and alligator leather strap. The hand-wound 590-part RD101 Quatuor movement – beats at a frequency of 16 Hz (115,200 vph) with its four sprung balances and five differentials.

Dynamic red and white accents are provided by the printed speedometer-style minute track, the white gold skeleton hands with SuperLumiNova-filled red tips, as well as the red strap stitching.

Technical details
Ø48 mm, Cobalt Chrome case, bezel, case back and crown, MicroMelt® process
Crystal sapphire case back
Thickness: 18.38 mm
Water Resistance: 5 BAR (50 m)


Blue PVD coated dial with red and white printed minute track, Blue PVD coated flange, Rhodium plated indexes, hands in white gold with red tips, power reserve indicator at 9 o’clock

Hand-wound calibre, RD101
Features: Hand-wound mechanical calibre, 5 differentials, 4 sprung balances, finely adjusted in six positions
Decorations: Blue PVD coated plate and bridges, “Poinçon de Genève” finishing

Hours and minutes, power reserve indicator

Blue alligator strap with red stitches
Clasp: Titanium grade 5 folding clasp

8 pieces

Poinçon de Genève

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