Roger Dubuis Excalibur Monobalancier

Roger Dubuis Excalibur Monobalancier

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Intriguing. Accomplished. Disruptive. Bearing all of the hallmarks of a work of art, Roger Dubuis is proud to unveil the Excalibur Monobalancier. Crafted from Mineral Composite Fibre (MCF) to enshrine this skeleton automatic monobalancier in a pure-white case, it embodies the House’s commitment to non-conformity, capturing the attention of all those dazzled by its clean whiteness. For those who choose to blaze their own trail, to show what happens when rules are reinvented and creativity is unleashed, it is a timepiece that proves the only limit for Hyper Horology is one’s own imagination.

Roger Dubuis Excalibur Monobalancier

A pure white masterpiece

Inspired by similar materials used in aerospace, MCF balances lightness with rigidity to enhance the 42mm timepiece into a new work of art, with a case, bezel and crown crafted from this pure-white, high-technology material.

Roger Dubuis Excalibur Monobalancier

Representing the House’s technical mastery and its desire to push boundaries, MCF is engineered from 99.95% silica and made via a Sheet Molding Compound (SMC) process that enables freedom of play, new possibilities, and the creation of intricate designs thanks to its sturdy structure 2.5 times lighter than ceramic and 13 per cent lighter than SMC carbon.

Roger Dubuis Excalibur Monobalancier

Constructed with peak wrist-wear comfort in mind while never forgetting the importance of standout aesthetics, Roger Dubuis specifically developed the material to remain stable and highly resistance to UV, artificial and natural light, while the addition of pigments deepens its whiteness. To maintain the all-white aesthetic, a white rubber strap is the perfect accompaniment to complete the look of this truly striking watch.

Roger Dubuis Excalibur Monobalancier

A signature skeleton

Capturing the two sides of the integrated Manufacture, the Excalibur Monobalancier infuses the tradition of horological craftsmanship with a daringly disruptive attitude. The skeleton automatic monobalancier is one of the proudest examples of this.

Roger Dubuis Excalibur Monobalancier

With a transparent view of its self-winding movement held directly on the inimitable Roger Dubuis star, the RD820SQ calibre features a skeleton microrotor reduced to its strict essence at 11 o’clock. Specifically developed to be as efficient as a full-size rotor, its construction ensures the watch winds perfectly to guarantee 60 hours of power reserve. Creating a rotor in such a small size and within the signature skeleton is an accomplishment mastered by few.

Roger Dubuis RD820SQ
Roger Dubuis RD820SQ

Sealed with the prestigious Poinçon de Genève, with every one of the components carefully finished by hand at the Manufacture in Geneva, this impressive feat of creative engineering is much like any masterpiece and therefore limited to 88 pieces only.

Roger Dubuis Excalibur Monobalancier

Roger Dubuis Excalibur Monobalancier Technical Specifications

Ref. DBEX0949


The Excalibur Automatic Skeleton features an MCF (mineral composite fiber) case. This new white material in watchmaking is light as a composite material (it is even 13% lighter than carbon) but is way more machinable than ceramic. The MCF used on the watch has been specifically developed so the resin it contains will remain stable and the whiteness of the material will remain intact (high resistance to UV light).

Roger Dubuis RD820SQ
Roger Dubuis RD820SQ


  • Name: RD820SQ
  • Energy: Mechanical, automatic-winding
  • Functions: Hour, minute
  • Components: 166
  • Jewels: 35
  • Frequency: 4 Hz (28’000 vph)
  • Power reserve: 60 hours
  • Diameter: 1 mm
  • Diameter in lines: 16
  • Thickness: 3 mm
  • Finishes: Circular-grained main plate and bridges with NAC coating. Trued-up anchor bridge with Rhodium plating


  • Type:       Excalibur with design signature: notched bezel and three lugs
  • Diameter: 42 mm
  • Material: Mineral Composite Fiber – MCF
  • Bezel: Mineral Composite Fiber – MCF
  • Crown: Mineral Composite Fiber – MCF
  • Glass: Sapphire crystal with anti-reflective coating
  • Case Back: Titanium open case back
  • Thickness: 4 mm
  • Water Resistance: 5 BAR (50 m) folding


  • Grey flange with transferred minute track and luminescent texts. Luminescent hour markers covered with SLN
  • Hands: Faceted white gold hands. One surface polished, the other shot-blasted. SLN in the centre


  • White rubber strap
  • Buckle: Titanium cover with stainless steel blades, double

About Roger Dubuis

The rush of adrenalin, a pounding heart, the sure and certain knowledge that something is about to happen: ENTER THE FUTURE OF HYPER HOROLOGY. Impertinent, excessive, incisive, uncompromising, and slightly mad, this is Roger Dubuis. Solidly sustained by an integrated Manufacture, an innovative spirit, a flagrant disregard for convention and irrepressible daring are the cornerstones of its irrepressibly bold attitude; the lifeblood of its non-conformist and unmistakably contemporary timepieces. That’s what Roger Dubuis is all about!  Laugh, scream, roar, and above all, create… for an exclusive tribe that believes in the value of living larger than life at every turn. Inspired by other cutting-edge industries and out-of-the-box designs, boundary-pushing technical sophistication combined with an inbred passion for extravagance to prove, time and time again, that Roger Dubuis is unquestionably the most exciting way to experience Hyper Horology. NO RULES, OUR GAME

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