New Roger Dubuis Excalibur Biretrograde Calendar In Steel – Full Overview
The latest evolution of the Excalibur line from Roger Dubuis brings one of its most emblematic complications into a more versatile and contemporary format. The new Excalibur Biretrograde Calendar in “Cosmic Blue” combines the brand’s unmistakable design language with a stainless steel construction and a refined 40 mm case, offering a fresh take on a signature complication.
A Signature Complication, Reimagined
At the heart of this model is the biretrograde calendar display — a defining feature for Roger Dubuis since the brand’s early years. The day and date are displayed via two semi-circular scales, with hands that snap back to their starting position at the end of each cycle. This dynamic motion adds both visual interest and mechanical complexity, setting the watch apart from traditional calendar layouts.

Powering the watch is the In-house calibre RD840. Developed and manufactured internally, the movement reflects the brand’s commitment to haute horlogerie standards. It carries the prestigious Poinçon de Genève, ensuring strict criteria in finishing, performance, and assembly.
Technically, the RD840 integrates a silicon escapement, enhancing efficiency and durability while contributing to a modern 60-hour power reserve. The use of advanced materials, including diamond-coated silicon components, underscores the blend of traditional craftsmanship and contemporary watchmaking innovation.
Case and Design: Bold Yet Refined
The Excalibur case remains one of the most recognizable designs in modern watchmaking. First introduced in 2005, its architectural identity — defined by a notched bezel, pronounced lugs, and sharp lines — is preserved here in a more compact and wearable 40 mm format.

Despite the reduced size, the watch retains its strong presence on the wrist. The stainless steel construction enhances everyday versatility while maintaining the bold character associated with the collection.
The “Cosmic Blue” dial adds depth and contrast, structured across multiple layers to create a sense of mechanical transparency. The retrograde mechanisms are partially visible, revealing cams and levers that animate the complication. This approach brings a technical, almost kinetic dimension to the dial without resorting to full skeletonisation.
Bracelet and Wearability
Complementing the case is an integrated stainless steel bracelet that mirrors the angular aesthetic of the watch. Its multi-link construction avoids conventional design cues, reinforcing the distinctive identity of the Excalibur collection.

For added versatility, the watch is delivered with an additional calfskin leather strap. Thanks to a quick-release system, switching between bracelet and strap can be done easily and without tools, allowing the wearer to adapt the watch to different settings.
Finishing and Mechanical Expression
The calibre RD840 is visible through the sapphire caseback, showcasing a high level of finishing consistent with the Geneva Seal requirements. Decorative techniques such as côtes de Genève, polished bevels, and perlage are applied throughout, highlighting the brand’s attention to detail.

On the dial side, the exposed elements of the biretrograde system contribute to the watch’s mechanical narrative. Rather than hiding complexity, Roger Dubuis emphasizes it — making the complication both functional and visually engaging.
A subtle but meaningful detail appears on the movement itself: an engraved inscription expressing the brand’s philosophy of honoring tradition while embracing innovation. It’s a fitting signature for a watch that bridges classical complications with modern execution.
A Contemporary Take on Haute Horlogerie
With this stainless steel “Cosmic Blue” edition, Roger Dubuis refines one of its most recognizable complications into a format that aligns with current preferences for more wearable dimensions and versatile materials — without compromising its bold identity.

The Excalibur Biretrograde Calendar remains unmistakably Roger Dubuis: expressive, technically sophisticated, and firmly rooted in high-end watchmaking.
Read more here.
General Specifications:
Brand: Roger Dubuis
Model: Excalibur Biretrograde Calendar
Reference: RDDBEX1209
Dial: Blue
Case Material: Stainless steel
Case Dimensions: 40 mm Diameter, 11.25 mm thickness
Crystal: Sapphire Glass
Case Back: Sapphire Glass
Water Resistance: 100 Meters
Strap: Stainless steel bracelet with a folding clasp, plus a calf leather strap with a steel folding clasp
Calibre: RD840
Functions: Hours, minutes, seconds, retrograde day and date
Winding: Automatic
Frequency: 4 Hz (28,800 Vph)
Power Reserve: 60 Hours
Price: CHF 35,000 plus VAT
Limited Edition: No
Availability: Now



