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
Oils

Oils

Are substances used to lubricate and protect the components of a watch movement. The oils work to reduce friction between the moving parts and minimize the wear caused by constant rubbing. This helps improve the performance of the watch and ensures smooth and accurate operation.

The types of oils used in watches vary depending on their function and where they are applied. There are oils specifically designed for lubricating bearings, pivots, and pallets, and there are oils specifically formulated for lubricating the mainsprings and the gear train of the watch. These oils differ in their viscosity, saturation level, and resistance to oxidation.