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
Oil sink

Oil sink

Oil sink, also known as an oil basin or oil tank, is a concave or hollow area located within a mechanical watch movement. It plays a crucial role in preserving and distributing lubricating oil to the essential components of the movement, including gears, bearings, and the escapement mechanism, which require proper lubrication to reduce friction and wear, ensuring smooth operation of the watch movement.

The reservoirs are strategically placed in areas that are prone to friction. Skilled watchmakers meticulously apply the appropriate lubricating oil to the oil reservoirs during assembly, ensuring reliable and smooth operation of the watch over time.