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
AM/PM indicator

AM/PM indicator

An AM/PM indicator on a wristwatch is a feature that displays whether it is morning or evening. This feature is commonly found on digital watches and is usually represented by the letters "AM" and "PM" on the watch face. The indicator can be useful for people who need to keep track of time in 12-hour format and want to avoid confusion between morning and evening.

Some analog watches also have an AM/PM indicator in the form of a day/night disc that rotates to show whether it is day or night. This is often seen in watches with complications such as world time or dual time zone displays.

It's worth noting that many modern digital watches use a 24-hour format, which eliminates the need for an AM/PM indicator. In these watches, the time is displayed in a continuous cycle of 24 hours, with no need to distinguish between morning and evening.