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
Jumping hour

Jumping hour

Are a complication that displays time in a unique way. After 60 minutes, the hour digits jump directly to the next hour. This jump is displayed on a sub-dial or window within the main watch dial, instead of using a traditional hour hand. This complication can also be displayed digitally on a dedicated small screen.

The mechanism of jumping hour watches typically includes a sub-dial or an aperture with hour numerals. When the current hour ends and the minutes reach 60, the mechanism swiftly moves the hour digit to the next hour, creating a sudden jump on the new hour. This mechanism provides a distinctive and accurate way of displaying time. Jumping hour complications are available in both mechanical and quartz watches.