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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Disc

Disc

A disc is a flat and thin component used in a watch mechanism to display the time or additional functions such as a calendar, moon phase, and other complications. It carries the indicators that are sequentially displayed through an aperture on the watch dial.

The disc is mounted on the central shaft of the watch and is connected to a precise mechanism of the watch movement, allowing it to rotate consistently with the advancement or change of functions. The watch disc is considered an important part of the watch design and contributes to the accurate and easy reading of the complications.