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
Subdial

Subdial

It is a small dial located within the main dial of a watch that serves a specific function or displays additional information. It is typically used to indicate a variety of complications or additional features in a watch, such as chronograph (stopwatch) measurement, date, day of the week, moon phase, power reserve, or other specialized functions.

The subdial may feature a set of hands, markers, or specific scales to provide the desired information or perform specific timing functions. It adds functional and aesthetic value to the design of the watch.