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
Flange

Flange

Is the edge that separates the dial and the front crystal of the watch, surrounding the dial's edge, and may contain a series of notches or teeth that align with the watch crystal to secure it in place.

The flange may include additional information or markings related to the watch's functions, such as scales for measuring speed, distance, or heart rate. The flange can come in a simple design or be adorned with various patterns and engravings.