Meet Swatch Sistem 51 (ref. SUTR401), a refined timepiece that blends thoughtful design with reliable performance. A study in proportion and durability: crafted in plastic and measuring 42 mm in diameter, with a thickness of 13.8 mm, defined by a round silhouette. The caseback is open, and the crystal is plexi, delivering water resistance to 3000 meters. The dial composition is deliberate and legible: a blue tone, framed by stick / dot hour markers, and stick hands. Beneath the caseback lies dependable performance: the Sistem51 caliber. Initial production year: 2015. 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.