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.
The skeletonized dial and movement of the elegant chronograph reveal deep insight into the fascinating world of a perfect mechanical watch.
Screw-down case back with satin finish and flat sapphire crystal
Diameter in mm
Height in mm
Partly polished, partly with vertical satin finish
Polished screw-down bezel with full thread and side knurling with curved, double coated anti-reflective sapphire crystal
Caliber C. 741 S, automatic, skeletonized
4 Hz 28,800 A/H
Power reserve in hours
Number of jewels
Solid sterling silver (925), skeletonized
Central hours and minutes, small seconds, central chronograph seconds, 30-minute counter, 12-hour counter, analog date
Design of hands
Thermally blued, diamond cut and curved; minute hand bent by hand