Experience the craft of Corum in the Bubble (ref. L390/03640), an elegant watch engineered for daily versatility and long-term reliability. From profile to crystal, the architecture convinces: crafted in titanium and measuring 52 mm in diameter, with a thickness of 20.2 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire, delivering water resistance to 10000 meters. Up close, the dial rewards inspection: a silver tone, executed in brass, framed by stick / dot hour markers, and proprietary hands. Among collectors, it is nicknamed "Golf". Inside, precision takes center stage: the CO 390 caliber. Released in a constrained run, appealing to focused collectors. Introduced in 2018. Designed for real-world wear, the watch transitions smoothly from tailored looks to casual settings. Manufacturing tolerances and surface treatment highlight consistent quality control. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.