The Excalibur Bi-Retrograde Calendar by Roger Dubuis

This year, Roger Dubuis celebrates its 30th anniversary, and for the occasion, the company pays tribute to its co-founder’s favourite complication: the bi-retrograde display.

This function, previously featured in the Excalibur Grande Complication alongside a dozen other highly complex mechanisms, takes centre stage once again. The Maison has also introduced a less complicated, more classic edition to further honour the bi-retrograde display.

Also referred to as “the ecliptic counters” by the Maison a nod to their elliptical shape and distinctive role in indicating the months and date the design showcases a symmetrical dial layout. Enhanced by refined detailing, it pays homage to the Maison’s early creations from 1996.

Glossary

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Glossary
Sunburst

Sunburst

Is a pattern used in watchmaking to create a surface finishing that resembles radiating sun rays. This pattern is achieved by applying symmetrical and equal lines on the watch dial. It enhances the attractiveness of the watch and adds beauty and uniqueness to it.

The sunburst pattern is created by engraving or etching radial lines that emanate from the center of the dial and extend outward. The lines gradually become thinner and more spaced as they move away from the center, creating a stunning effect of light and shadow.

Difference between Sunburst and Sunray pattern:

Although "Sunburst" and Sunray patterns are sometimes used interchangeably, there is a slight difference between the two. "Sunburst" refers to the pattern created by radial lines that resemble sun rays emanating from the center. On the other hand, Sunray refers to a pattern created by straight or curved lines branching out from a single point, resembling sun rays. This pattern can be seen on the dial and edges of the watch, while Sunburst is more closely associated with the watch dial.