BBR Roger Dubuis Excalibur RDDBEX0479 Tourbillon 45mm
The BBR Roger Dubuis Excalibur RDDBEX0479 combines a 45mm titanium case with an openworked dial, star-shaped movement architecture, tourbillon construction, and a custom Sea-Gull RD505SQ manual-winding mechanical movement.
The case measures 13.5mm in thickness, while the openworked construction exposes a large portion of the mechanical architecture from the front and rear. A Celtic-cross-inspired tourbillon structure, luminous details, sapphire crystal, and rubber strap complete the technical design of this model.
45mm Titanium Case
The RDDBEX0479 features a 45mm titanium case with a thickness of 13.5mm.
Titanium gives the large case a distinctly technical appearance while complementing the openworked mechanical construction.
The case proportions also provide sufficient visual space for the star-shaped framework and tourbillon architecture that dominate the front of the watch.
Openworked Star-Shaped Architecture
One of the most recognizable elements of the RDDBEX0479 is its openworked star-shaped framework.
Rather than using a conventional solid dial to cover the movement, the open construction exposes the mechanical components and supporting bridges.
The geometric framework becomes an integral part of the dial design, allowing the movement architecture itself to form much of the visual identity of the watch.
Tourbillon Construction
The watch incorporates an integrated mechanical tourbillon within the openworked architecture.
A Celtic-cross-inspired structure surrounds the tourbillon assembly, giving this area a distinctive geometric appearance.
Because the surrounding dial is extensively skeletonized, the tourbillon remains visually prominent rather than being partially concealed beneath a conventional dial.
Custom Sea-Gull RD505SQ Manual-Winding Movement
The watch is powered by a custom Sea-Gull RD505SQ manual-winding mechanical movement.
The movement integrates the tourbillon into its mechanical architecture and uses an openworked construction that can be viewed through the front and rear of the watch.
Its supplied power-reserve specification is approximately:
50 hours
As a manual-winding movement, energy is supplied mechanically through the crown rather than through an automatic rotor.
Movement Finishing
The openworked movement incorporates decorative finishing across visible components.
Details include finishing on the upper bridges together with perlage-style circular graining, adding texture to surfaces that remain visible through the skeletonized construction.
Each movement also carries an individual identification number, providing a separate identifying detail for the movement.
Openworked Dial
The dial uses an extensively skeletonized construction, allowing the movement and supporting framework to remain visible.
Luminous hour markers are positioned around the display to maintain time readability against the mechanically complex background.
This arrangement combines the functional time display with the exposed mechanical architecture rather than separating the movement behind a conventional dial.
Small Seconds Display
The watch incorporates a dedicated seconds display with a small-seconds hand.
Its structure uses DLC-coated titanium and includes a black minute track together with Roger Dubuis lettering.
The dark surface provides contrast against the surrounding openworked movement components.
Luminous Hands and Hour Markers
The hands incorporate luminous coating, while the hour markers also include luminous details.
These elements improve the visual separation of the time display from the complex skeletonized background, particularly under lower-light conditions.
Sapphire Crystal with Anti-Reflective Coating
The front of the watch is protected by a sapphire crystal with anti-reflective coating.
The high transparency of sapphire is particularly useful with an openworked watch because the movement architecture, tourbillon, hands, and dial framework remain important visual elements from the front.
The anti-reflective treatment helps reduce distracting reflections across the crystal surface.
Front and Rear Openworked View
The skeletonized mechanical architecture can be observed from both the front and rear of the watch.
From the dial side, the star-shaped framework and tourbillon dominate the visual structure.
The rear view provides another perspective on the RD505SQ movement, its bridges, mechanical components, and decorative finishing.
Together, the two viewing angles make the mechanical construction itself a central part of the RDDBEX0479 design.
Natural Rubber Strap
The watch is fitted with a natural rubber strap.
Its flexible construction complements the large 45mm titanium case and maintains the sport-oriented appearance of the Excalibur design.
Rubber also provides a visual contrast against the titanium case and complex openworked mechanical structure.
Technical Specifications
Specification Details
Factory BBR Factory
Brand Roger Dubuis
Collection Excalibur
Reference RDDBEX0479
Case Diameter 45mm
Case Thickness 13.5mm
Case Material Titanium
Dial Openworked / Skeletonized
Framework Star-Shaped Architecture
Movement Custom Sea-Gull RD505SQ
Movement Type Manual-Winding Mechanical
Complication Tourbillon
Power Reserve Approx. 50 Hours
Movement Identification Individual Number
Seconds Display Small Seconds
Seconds Display Material DLC-Coated Titanium
Hour Markers Luminous
Hands Luminous Coating
Crystal Sapphire Crystal
Crystal Treatment Anti-Reflective Coating
Strap Natural Rubber
Mechanical Design
The RDDBEX0479 places its mechanical architecture at the center of the design.
The star-shaped framework creates the main geometric structure, while the tourbillon and exposed RD505SQ movement remain visible through the openworked dial.
This approach allows bridges, wheels, the tourbillon assembly, and decorative finishing to contribute directly to the appearance of the watch.
The combination of a titanium case and skeletonized mechanical architecture also distinguishes this configuration from conventional closed-dial Excalibur models.
Wearing and Care
The RD505SQ is a manual-winding mechanical movement and should be wound smoothly through the crown. Excessive force should be avoided once noticeable resistance develops.
The tourbillon and openworked architecture contain numerous visible mechanical components, so the watch should be protected from strong impacts and powerful magnetic fields.
For regular cleaning, use a soft microfiber cloth on the titanium case and sapphire crystal. Abrasive polishing materials should be avoided, particularly on finished titanium and DLC-coated components.
Frequently Asked Questions
What is the case size of the BBR Roger Dubuis RDDBEX0479?
The titanium case measures 45mm in diameter and 13.5mm in thickness.
What movement does the RDDBEX0479 use?
It is powered by a custom Sea-Gull RD505SQ manual-winding mechanical movement.
Does the RD505SQ movement have a tourbillon?
Yes. The movement incorporates a tourbillon within its openworked mechanical architecture.
What is the power reserve?
The RD505SQ has an approximate 50-hour power-reserve specification.
What material is used for the case?
The RDDBEX0479 uses a titanium case.
Is the dial skeletonized?
Yes. The watch uses an openworked dial and star-shaped framework, exposing a substantial portion of the movement architecture.
What type of crystal does the watch use?
It uses a sapphire crystal with anti-reflective coating.
Does the movement have an individual number?
Yes. Each movement carries an individual identification number.
What type of strap is fitted to the watch?
The RDDBEX0479 is fitted with a natural rubber strap.
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