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.

Certina

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Certina is a Swiss watch brand that was founded in 1888 by brothers Adolf and Alfred Kurth in Grenchen, Switzerland. The brand is known for its sporty and rugged watches that are built to withstand the rigors of various outdoor activities. Certina watches are also known for their reliability, precision.

One of the key features of Certina watches is their use of the DS (Double Security) system, which was introduced in the 1950s. The DS system is designed to enhance the durability and water resistance of the watches, and it involves a series of features including a reinforced caseback, a thicker crystal, and a crown protection system.

Certina offers a range of collections, including the DS Action, DS Podium, and DS-8, And other groups. The DS Action collection is particularly popular among divers and features water resistance up to 300 meters, while the DS Podium collection is designed for motorsports enthusiasts.