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
Jewels

Jewels

They are synthetic sapphires or gemstones, which are used as bearings to hold the watch's drive parts to reduce friction and wear of these parts, allowing for the smooth and accurate operation of the watch.

These gems are carefully placed at strategic points within the movement of the watch, and sapphire or synthetic gems are preferred for this purpose as they have excellent hardness and durability, which helps reduce friction and prevent increased wear over time. Gem bearings provide a smooth surface for the rotating or pivoting parts of a watch, allowing them to move with minimal resistance.