Roger Dubuis Excalibur Blacklight Spin-Stone™ Monoblancier Revealed

by Sameera Gamage

As we all know, Roger Dubuis creates some exceptional timepieces that push the boundaries of modern watchmaking. You only need to look at some of the timepieces in their iconic Knights of the Round Table collection to grasp the concept of hyper-horology and why they are one of the leading brands in this market.

For Roger Dubuis, creating timepieces that stand out and never be afraid to shine is engraved into their watchmaking DNA. An innovator that knows how to push the boundaries of craftsmanship and design to create some of the most stunning watches ever made in the watch industry. It looks like we have hyped up this brand quite a bit, but rightfully so, as their latest release, the Excalibur Blacklight Spin-Stone™ Monoblancier, is just something else entirely.

Unleashing the full potential of colourful luminescence, every detail of the new Excalibur Blacklight Spin-Stone™ Monoblancier is made to stand out, regardless of if it’s day or night. Roger Dubuis Blacklight’s collection has already cemented itself as a timepiece that masters radiant aesthetics while having excellent performance. This latest Spin-Stone™ Monoblancier takes this iconic collection to new heights with its glowing artistic originality.

While the audacious dial is certainly the centre of attention, the sophistication behind what holds it all together must not be left out. The 42mm case is made with the long-lasting Eon-Gold™. Eon-Gold™ is composed of 75% 18-carat gold and “non-tarnish technology”. This innovative material created by Roger Dubuis ensures that the watch case retains its brand-new showroom appearance for the life of the timepiece. The Excalibur Blacklight Spin-Stone™ Monoblancier comes with a white calf leather strap which is equipped with the brand’s versatile, quick strap release system, allowing for a touch of personal style on the watch.

The dial demands attention with its vivid spinels. Spinel is a valuable and expensive gemstone that owes its stunning colour to chromium, much like rubies and emeralds. Spinels come in a variety of colours, such as red, lavender, violet, blue, green, brown and black. The spinels used throughout the Excalibur Blacklight Spin-Stone™ Monoblancier grade from red to blue and have been coated in Super-LuminNova. The application of Super-LumiNova on these stones makes them even more incredibly stunning, especially at night or in low-light conditions. To get the exact shade for each spinel, including the uniformity and luminescence desired, each of the spinels has been synthetically grown.

It goes without saying that this watch set’s itself apart from others with its true innovation. The powerfully visible spinels that encircle the bezel and flange are a testament to this and have been given the name Spin-Stones™. This world premiere of this stone cut is patent-pending and showcases Roger Dubuis’s ability to push the boundaries of aesthetic design.

As mentioned earlier, the colours of this spinal arrangement range from red to blue, with aqua blue being on the bottom to then it transitioning to navy blue and pink, followed by red at the 12 o’clock position. This colour grading is carried out throughout the dial, from the bezel and flange to the inner workings of the eye-catching calibre’s framework, which is compromised of its own 3D spinels. The hour markers have their own spinels, which illuminate green in low-light conditions. During the day, the hour indices, like the rest of the spinels, have a much darker appearance, however still noticeable to make time readability easy.

Attention to detail is of utmost importance when it comes to Roger Dubuis’s timepieces. While this detail can be clearly seen on this timepiece, Roger Dubuis has taken it a step further with the placement of the spinels on the dial. On the bottom right corner of the dial, we see colourful micro-beams of light that reach out to form the branches of Roger Dubuis’ iconic star. At the heart of this star is non-other than a naturally fluorescent diamond, adding the final touch of detail to a brilliant timepiece.

The Excalibur Blacklight Spin-Stone™ Monoblancier comes with the in-house automatic RD720SQ calibre movement, which now has an increased power reserve of 72 hours. To improve stability, the movement features an optimised micro-rotor to minimise vibrations, and the balance wheel inertia has been doubled to make the timepiece more resistant to shocks. To improve efficiency and energy transmission further, the shape of the escapement has been reconfigured and given diamond-coated silicon pallet stones and new lube.

Roger Dubuis’s all-new colourful and luminous Excalibur Blacklight Spin-Stone™ Monoblancier is sadly limited to 28 pieces worldwide. A marvel creation in the world of Haute Horology, the innovation behind this timepiece breaks through barriers that will pave the way for further creations that are surely bound to entertain us with what’s possible in the world of watchmaking.

Reference: RDDBEX0950


  • Case: 42mm diameter
  • Case Material: Eon-GoldTM Case with Eon-GoldTM bezel
  • Dial: Pink gold plated double surface flange set with curved synthetic spinels SPIN-STONE TM with gradient hues
  • Crystal:  Sapphire crystal with Anti-Reflective Coating
  • Water resistance: 10 Bar (100m)
  • Movement: RD720SQ Calibre
  • Power reserve: 72 Hours
  • Bracelet/Strap: Embossed white calf leather strap.

Australian Recommended Retail Price: AUD 230, 000

Availability: Available now and a limited edition of 28 pieces. Boutique and E-commerce only.

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