Discover Seiko's precision with the Prospex Sky (ref. SRPB57K1), a distinctive model that balances proportion, precision, and presence. On the wrist, the case feels purposeful: crafted in stainless steel and measuring 44.7 mm in diameter, defined by a round silhouette, paired with a rotating, 0-60 (dive) bezel. The caseback is open, and the crystal is hardlex, delivering water resistance to 10000 meters. Visually, the face is where character emerges: a black tone, framed by arabic numerals hour markers, and syringe hands. Mechanically, the watch prioritizes accuracy: the 4R35 caliber. Initial production year: 2017. 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.