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
Carat

Carat

It’s percentage of pure gold in different gold alloys. It represents the purity on a scale of 24 units, where pure gold is represented as 24-carat gold. For example, 18-carat gold contains 18 units of pure gold and 6 units of other metals, making it 75% gold. 24-carat gold is considered pure gold. Carat is also used to measure the mass of gemstones and is not used to indicate their purity. One carat is equal to 200 milligrams.