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
Quarter repeater

Quarter repeater

Is a complication found in some watches that allows the wearer to audibly tell the time by activating a mechanism that chimes the hours, quarters, and minutes. When the wearer activates the quarter repeater function, small hammers strike tuned gongs to produce different tones representing the time. The number of strikes on the gongs corresponds to the hours, quarters, and minutes.

The quarter repeater is called so because it typically chimes the hours, quarters (15-minute intervals), and minutes. For example, if the time is 7:47, the quarter repeater would chime seven times for the hours, three times for three quarters (45 minutes), and twice for the minutes.