Introducing Frederique Constant Slim Line (ref. FC-306G4STZ9), a refined timepiece that blends thoughtful design with reliable performance. A study in proportion and durability: measuring 40 mm in diameter, with a thickness of 8.3 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire, delivering water resistance to 3000 meters. The dial composition is deliberate and legible: a black tone, framed by stick / dot hour markers, and feuille hands. Beneath the caseback lies dependable performance: the FC-306 caliber. 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.