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.

Delma

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Delma is a Swiss luxury watch company that has been producing high-quality, sophisticated watches for nearly a century. It was founded in 1924 by brothers Adolf and Albert Gilomen as A. & A. Gilomen S.A. in Lengnau near Grenchen, Switzerland. In 1966, the company was renamed Delma Watch Ltd.r.
Delma’s history is marked by several notable achievements and watch launches. The Delma insignia first appeared on pocket and wristwatches in 1933, followed by the first chronograph in 1946. In 1975, the company enjoyed great success with its two professional divers’ watches: the Shell Star and Quattro.

In 1991, Delma launched its Klondike collection as an annual limited-edition mechanical gold and platinum collection which has served as Delma’s signature line ever since
Delma has continued to innovate and expand its collections over the years. In 2011, Delma released a professional diver’s watch with a water-resistance to 3,000 meters. Delma watches are divided into five subsections: Racing, Diver, Dress and Ladies.