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
Balance Wheel

Balance Wheel

The balance wheel is a weighted wheel that oscillates back and forth thanks to the balance spring, and its main purpose in watches is to regulate and adjust timekeeping.

The balance wheel converts the continuous rotational motion from the balance spring into precise and equal oscillations. The frequency of the balance wheel's oscillations is accurately adjusted to allow the watch to maintain accurate and regular time. As the balance wheel swings back and forth in equal oscillations, it allows the gear mechanism in the watch to advance a specific amount with each oscillation, thereby moving the watch hands forward consistently. Thus, the balance wheel enables the watch to maintain time accuracy by providing a constant and regular regulation of the watch's movement.