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.

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Interview Bernhard Lederer showcasing the Remontoire d’Egalité in his Watches

ByWaqt

08.02.2024

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Bernhard Lederer showcasing the Remontoire d’Egalité in his Watches

One of exciting Waqt’s coverages during our visit to Geneva was with the master watchmaker Bernhard Lederer, where he presented to us his latest watch at the time, and Lederer explained to us the “Remontoire d’Egalité”, which the manufacturer had developed specifically for the “Central Impulse Chronometer” collection. We talked in detail about These watches in this article.

The remontoir d’égalite employs an additional wheel, positioned between the fourth wheel of the gear train and the escapement. Using a short-duration spring, the intermediate wheel delivers a uniform pulse of power to the escapement. Unlike a regular mainspring that’s designed to harness lots of power, the short-duration spring blade releases its energy over a comparatively short period, in this watch every 10 seconds.

2024