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
Grain finishing

Grain finishing

A decorative pattern or texture applied to the surface of the dial. It gives the watch dial a finish that resembles barley grains. The grain pattern is achieved by engraving a series of fine and evenly spaced lines on the surface of the dial. These lines can be oriented horizontally, vertically, or radially, depending on the desired aesthetic effect. The purpose of adding the grain pattern to the dial is to enhance its visual appeal by creating a delicate texture that captures light and adds depth to the overall design.

Usually, the grain pattern is achieved using specialized techniques such as "guilloché". These techniques involve the use of machines or lathes that are operated manually to create consistent and uniform lines on the surface of the dial. The intensity and pattern of the grains can vary, ranging from fine and delicate grains to more prominent and bold ones.