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

Home
Glossary
Tourbillon

Tourbillon

The tourbillon is a complex mechanism found in some watches that compensates for the effects of gravity on the accuracy of the timepiece. It is characterized by a rotating axis that carries a set of hands and mechanical components.

Gravity, resulting from the Earth's gravitational force, can cause slight variations in the oscillation rate and accuracy of traditional mechanical watches. The tourbillon was designed to address this issue.

In a tourbillon, an independent rotating assembly is installed within the watch and rotates regularly around its own axis. This design compensates for the effects of gravity on the hands and watch components, thereby improving its accuracy.