Discover IWC's precision with the Grande Complication (ref. IW3770-13), a refined timepiece that blends thoughtful design with reliable performance. A study in proportion and durability: crafted in platinum 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. The dial composition is deliberate and legible: a silver tone, framed by stick / dot hour markers, and dauphine hands. Beneath the caseback lies dependable performance: the 79091 caliber. Introduced in 19902010. Comfort and balance define the wearing experience, making it an easy daily companion. Subtle transitions between textures elevate the overall impression. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.