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
Grenage

Grenage

Is a method used to create watch dials that was popular in the 1800s but is not commonly used today. With this technique, the dial is made of solid silver and is engraved with intricate designs such as numbers or minute markers. The engraved areas are then carefully filled with lacquer by hand, and once the lacquer hardens, it is polished using diamond paper to create a smooth and shiny surface. Essentially, grenage involves engraving patterns on a silver watch dial and filling those patterns with lacquer to enhance their appearance.