Duke Horlogerie

DUKE Haute Horlogerie was conceived in 2018 by Alessio Muller, who grew up commuting between Luxembourg and Switzerland from age 18 — Vianney Halter was among the independent watchmakers who agreed to mentor him, and Alessio spent six years, from 2016 to 2022, training as a polisher under Bekim Fifaj, who would go on to join Manufacture Grand-Ducale. Together with his father Denis, whose background is in haute couture, the pair built DUKE around the idea of a genuine watch manufacture based in Luxembourg — a country with almost no horological industry of its own despite being the birthplace of Jean-Claude Biver.

The brand's debut, the First Edition Clarity Tourbillon, is a 44mm octagonal watch whose case design draws on the angular language of Gérald Genta, forged in carbon fiber with titanium inserts and produced at the Luxembourg atelier. Inside is the in-house Calibre 9600, an automatic flying tourbillon beating at 21,600 vph (3Hz) with a 72-hour power reserve, 30 jewels, and a tourbillon cage suspended between double sapphire bridges for an apparently weightless float. Its self-winding rotor — the 'Invisible Rotor' — is cut from sapphire crystal and runs on ceramic ball bearings, designed to be almost imperceptible so the movement remains fully visible from the back. Finishing is entirely manual: beveling, mirror polishing, and alternating grained, sun-brushed, and shot-blasted surfaces, with the movement itself produced by Manufacture Grand-Ducale in the Swiss Jura.

A second model, Duke by Vianney Halter, paired the same Clarity Tourbillon architecture with Halter's own design input as a formal collaboration between the two houses; both the First Edition and the Halter collaboration were produced as series of eight pieces and sold out quickly. By the end of 2024, Muller was already developing a third generation: a smaller 41mm, 10mm-thick case (down from 44mm and 14.5mm) in titanium throughout — including the dial, with only the mainspring and balance spring in steel — alongside a simpler three-hand automatic without a tourbillon aimed at a broader audience around €50,000–60,000. DUKE groups its output under the 'AART Collection,' with the Clarity Tourbillon as its first expression and the 'Reversity' name attached to ongoing technical development.