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
Pellaton (Winding System)

Pellaton (Winding System)

Pellaton winding system is an invention by Mr. Albert Pellaton. This system is characterized by an automatic winding mechanism used in mechanical watches, where it harnesses the natural motion of the wearer's arm to wind the main spring with energy.

The system employs a unique rotating design that rotates the main spring during the movement of the rotor in the direction of the watch's hands and in the opposite direction. By utilizing a series of levers and gears, it enhances the transfer of rotational force generated by the rotor. The Pellaton winding system, often associated with the "IWC" brand (International Watch Company), is an example of dedication to innovative and reliable winding technology, enhancing the accuracy and reliability of the watch.