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
Leap Year

Leap Year

A leap year is a year that has 366 days, with the month of February having 29 days instead of 28. It occurs every four years.

In some watches, a leap year complication is added to ensure the accurate display of the date. When a watch has a leap year function, it recognizes leap years and automatically updates the date from February 28 to February 29. Watches with a leap year complication have precise mechanisms that calculate days, months, and years accurately, including handling the leap year.

This complex function in watches is important for individuals who value precise date and timekeeping. Thanks to this complication, users do not need to manually adjust the date every leap year as it is done automatically.