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
Helium Escape Valve

Helium Escape Valve

It is a one-way valve specific to deep-sea diving watches. This valve helps release the helium gas that may enter the watch during deep dives. The accumulation of this gas inside the watch can lead to the explosion of the watch crystal as the diver ascends to the surface. The helium escape valve allows for the safe release of the helium gas pressure without allowing water molecules to enter the watch.

The helium escape valve allows the small helium particles to escape while preventing the entry of water molecules. This feature helps protect the watch and ensure its proper functioning during and after deep-sea diving. However, the helium escape valve is not necessary for regular recreational diving.