Introducing Rolex Sea-Dweller (ref. 16660 Matte MK2), a distinctive model that balances proportion, precision, and presence. On the wrist, the case feels purposeful: crafted in stainless steel and measuring 40 mm in diameter, with a thickness of 14.8 mm, defined by a round silhouette, paired with a rotating, 0-60 (dive) bezel. The caseback is closed, and the crystal is sapphire, delivering water resistance to 122000 meters. Visually, the face is where character emerges: a black tone with matte finish, framed by stick / dot hour markers, and mercedes hands. Among collectors, it is nicknamed "Mark 2". Mechanically, the watch prioritizes accuracy: the 3035 caliber. Initial production year: 19801988. 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.