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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Latitude

Latitude

Latitude is the angular distance of a specific location on the Earth's surface north or south of the equator. Lines of latitude start at the equator (0 degrees latitude) and extend east and west, parallel to the equator. Latitude is measured in degrees north or south of the equator up to 90 degrees at the North and South Poles. Latitude plays a crucial role in determining location and climate.

Latitude is an important factor to consider when determining the position of a watch wearer in relation to the geographical coordinates of the Earth. It plays a significant role in some watch features that rely on geographical data, such as the complication of world time or sunrise/sunset indicators. By incorporating latitude data into these watch functions, users can accurately track time and anticipate daylight hours based on their position relative to the equator.