45mm shot-blasted black DLC Titanium. The 360° Rim Rotor: Turning the watch over reveals a full circular oscillating weight. Lightweight Titanium Core: Despite a commanding45mm presence on the wrist, the watch remains incredibly light and hypoallergenic.
Roger Dubuis excalibur EX42-78-90-00-03R01A
Roger Dobuois EX42 Excalibur Chrono.