Seikonaut – Black PVD Skeleton Mod with Silver Dial and Black Strap (40mm)

This 40mm Seikonaut build delivers a striking mix of stealth and refinement, combining a full black PVD case with silver hands and indexes over a fully exposed skeleton dial. The contrast gives this piece incredible legibility and a sharp, modern look.

Inside beats the Seiko NH72 movement, one of the best skeleton calibers available for modding. Unlike typical Seiko Nautilus open heart designs, which reveal only a small part of the movement, this version removes the dial entirely — offering a full view of the gear train, balance wheel, and bridges in motion.

It’s a clear step up from a standard Seiko dial, giving you a living, breathing mechanical centerpiece on the wrist. The black rubber strap keeps the look cohesive and wearable, while the PVD-coated case adds a stealthy luxury finish that resists scratches and daily wear.

Compatible with other high-quality Seiko mod watches components, this build is all about clarity, movement, and bold contrast — a true favorite among modders who want presence without flash.

Disclaimer: This is a custom-built watch assembled by us using genuine TMI (Time Module Inc.) movements, a subsidiary of Seiko Instruments Inc., part of Seiko Group Corporation.
This product is not an official Seiko watch and is not endorsed by or affiliated with Seiko Group Corporation or its subsidiaries.