Seikomariner | All Black PvD Case – Rubber Strap

The Seikomariner All Black PVD is the statement piece in MedoMods' sport-diver lineup. Where most dive-style watches offer a contrast between case metal and bezel colour, this build commits fully to a single, unified palette: PVD-coated black from crown to caseback, paired with a black rubber strap that absorbs rather than reflects light. The result is a watch with almost zero visual noise — just clean geometry, sharp lume, and the quiet confidence of a piece that does not need colour to get noticed.

Movement

Power comes from the Seiko NH35 automatic, a workhorse movement with hacking seconds and hand-winding capability built in. On a typical day's wear the rotor keeps it wound; pull the crown to hack the seconds and set time precisely; wind manually if the watch has been sitting for more than a day or two. The approximately 41-hour power reserve gives comfortable margin for weekends off the wrist. Water resistance is rated to 5 ATM — suitable for hand-washing, rain, and light water contact, though not for diving.

Case & Crystal

The 40 mm case in 316L stainless steel wears a full PVD coating that gives it its signature blacked-out character. The sapphire crystal is scratch-resistant, protecting the dial through the everyday hazards of sleeve catches and countertop brushes. At approximately 12 mm thick the profile stays trim without sacrificing the solid feel the case material provides. A screw-down crown seals the case against water ingress under daily conditions.

Dial & Lume

The black dial is exactly what a stealth sport watch demands: maximum contrast between the applied hands and indices — which carry Super-LumiNova — and the dark background. In daylight the watch reads crisply; in darkness the lume glow takes over completely, providing the kind of no-nonsense legibility that made the dive-watch form relevant in the first place. The rubber strap with butterfly clasp keeps the blacked-out theme consistent from crown to buckle.

On the Wrist

The rubber strap is the natural complement to PVD steel: lightweight, comfortable through temperature changes, and easy to swap if you want a different look. The butterfly clasp holds securely without the bulk of a traditional pin buckle, and the strap adjusts across a practical range of wrist sizes. The overall package is sporty, focused, and distinctly purposeful — a daily driver that never demands attention but always rewards it.

Why MedoMods

Each Seikomariner All Black PVD is assembled and quality-controlled before dispatch, with tracked international shipping included — taxes and duties covered, no surprise fees at delivery. This is an independently built custom mod watch using genuine Seiko movements and aftermarket components. For anyone who wants a total-blackout sport aesthetic with proven NH35 reliability and the craftsmanship of German hand-assembly, this is a direct answer.

• Case diameter: 40 mm (excluding crown)

• Thickness: approx. 12 mm

• Movement: Seiko NH35 automatic – hacking & hand-winding

• Crystal: Sapphire, scratch-resistant

• Case & Coating: 316L stainless steel, full PVD black

• Strap: Black rubber with butterfly clasp

• Water resistance: 5 ATM

• Includes: Free bracelet-sizing tool