Discover IWC's precision with the Grande Complication (ref. IW3770-05), a distinctive model that balances proportion, precision, and presence. On the wrist, the case feels purposeful: crafted in yellow gold and measuring 42.2 mm in diameter, with a thickness of 16.3 mm, defined by a round silhouette. The caseback is closed, and the crystal is sapphire, delivering water resistance to 1000 meters. Visually, the face is where character emerges: a silver tone, framed by stick / dot hour markers, and baton hands. Mechanically, the watch prioritizes accuracy: the 79091 caliber. Initial production year: 19902010. The silhouette offers presence without excess, lending confidence in a range of situations. Finishing showcases disciplined attention to detail across facets, edges, and surfaces. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.