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
Dividing head

Dividing head

A dividing head or division plate is a disc or plate that contains a series of evenly spaced holes or notches that correspond to specific divisions of time, such as minutes or seconds. It is typically used in conjunction with other tools and machinery in watchmaking to accurately set and adjust the timing functions of the watch. By aligning the appropriate hole or notch with a reference point, watchmakers can ensure precise division and synchronization of the watch's timing mechanism, allowing for accurate measurement and display of time.