
Aquanaut-Inspired Seiko Mod – Rosegold Accents on Black PVD Case with Green Strap
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Seikonaut – Black Skeleton Seiko Mod with Rosegold Dial & Green Strap (40mm)
This 40mm Seikonaut delivers one of the boldest color combinations in the lineup: a deep black PVD case, refined rosegold hands and indexes, and a vivid green rubber strap. It’s a striking, high-contrast configuration that blends elegance and sport in perfect proportions.
At its core is the NH72 skeleton movement, showcasing every detail of the inner mechanics. Unlike a typical Seiko Nautilus open heart dial, this design removes the entire surface — exposing the balance wheel, gear train, and bridges in motion. The result is a build that’s not only more complex, but far more expressive than any stock Seiko dial can offer.
The green strap brings energy to the darker case and warm dial elements, making this mod one of the most visually balanced and unique pieces in the Seikonaut series.
Fully compatible with high-grade Seiko mod watches parts, this watch is a go-to choice for builders seeking modern styling with layered mechanical depth.
Our watches can easily be adjusted to fit your wrist perfectly. With our watches we include a tool so you can wear it as soon as it has arrived!