The 2020 version of the exceptionally complex 300-part masterpiece Opus Chronograph – which in 1995 advanced the skeletonising chapter at Chronoswiss – has been thoroughly updated. It now offers a modern geometry with a 41-millimetre case and shorter lugs. At the core of the Opus Chronograph beats the Chronoswiss Caliber C.741S - a skeletonized automatic chronograph movement refined for transparency and performance. Visible through the open architecture, it features black galvanized bridges and a CVD-coated, skeletonized rotor, adorned with subtle Côtes de Genève. With central chronograph seconds, 30-minute and 12-hour counters, a small seconds display, and an analog date function, the movement delivers both function and finesse. Operating at 28,800 vibrations per hour with a power reserve of 46 hours, it is the mechanical pulse of this reimagined icon. 100 M / 10 ATM water resistance.