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
Carbonado

Carbonado

Carbonado, also known as the "Black Diamond" or "Carbonado Diamond," is a unique type of diamond with a distinctive structure and appearance. It is characterized by a polycrystalline structure made up of numerous small diamond crystals fused together. Typically, carbonado is black or dark gray in color and is known for its rough, uneven surface.

In the watch industry, carbonado is used as a material for watch dials, cases, and bracelets. Its incorporation into watchmaking adds a unique and contemporary touch.