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
Pantograph

Pantograph

Is a mechanical device used to accurately reproduce intricate patterns and designs on the watch's dial, case, and other components. It consists of linked arms or bars arranged in a parallelogram shape, with one end connected to a fixed point and the other end holding a pen or cutter. By tracing the original pattern using the pen, the Pantograph replicates the motion in a consistent manner.

Watchmakers use Pantographs to achieve precise and consistent replication of logos, decorations, or decorative patterns on various parts of the watches. Despite the availability of modern pattern replication methods, this traditional tool retains its importance in watchmaking, as skilled craftsmen continue to rely on its accuracy and artistic value.