NAUTIKO | SKELETON

Seiko Mod Nautilus with NH70 – Visible mechanics meets iconic design

The Seiko Mod Nautilus with transparent dial pays homage to one of the world's most famous watch cases—but with a bold, modern twist. Inside this 41 mm automatic watch is the skeletonized Seiko NH70 movement, visible through the open dial and crystal-clear display case back. The result: a watch that perfectly combines mechanical fascination with timeless elegance.

This model is aimed at watch lovers who are looking for something special – not only in terms of technology but also in terms of design.

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Open mechanics, open statement

The highlight of this version is undoubtedly the open dial, which deliberately provides a view of the automated inner workings. The skeletonized construction visually brings the movement of the watch to the forefront, making every second an experience. The fine decoration of the bridges and gears creates a clear contrast to the clean case design – a true statement for mechanical enthusiasts.

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41 mm stainless steel case with elegant proportions

The case is made of solid 316L stainless steel and has been carefully satin-finished and polished. Its balanced shape draws inspiration from an iconic design, yet remains distinctive enough to serve as a modern interpretation. At just 12 mm thick, the watch appears pleasingly slim and sits comfortably on the wrist—even under tight-fitting shirt cuffs.

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Drive: The Seiko NH70 automatic movement

Inside is Seiko's skeletonized NH70 caliber – a reliable, low-maintenance automatic movement with a power reserve of approximately 41 hours. The movement winds automatically through arm movements or can be wound manually using the screw-down crown. Because it's an "open-heart" movement, the timekeeper can also be observed directly on the dial – a subtle detail that will delight not only tech buffs.

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Sapphire crystal & Luminova for maximum everyday suitability

Scratch-resistant sapphire crystal is used to protect the delicate mechanism – with an additional anti-reflective coating for optimal legibility. Hands and indices are coated with Luminova, ensuring reliable legibility even in the dark. The 3 ATM water resistance protects the watch from rain, splashes, and all the challenges of everyday urban life.

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Stainless steel bracelet with butterfly clasp

The integrated 316L stainless steel link bracelet blends seamlessly with the case. It can be adjusted to fit wrists from 14.5 to 22 cm. The butterfly clasp ensures a secure fit – understated in appearance, yet reliable in its grip. With 13 mm lugs, the watch looks both modern and sporty.

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Technical details at a glance

• Case diameter: 41 mm (without crown)

• Case height: 12 mm

• Movement: Seiko NH70 automatic movement (skeletonized)

• Power reserve: approx. 41 hours

• Glass: Sapphire crystal, scratch-resistant, anti-reflective

• Luminescent material: Luminova (hands & indices)

• Case material: 316L stainless steel

• Crown: Screw-down

• Bracelet: stainless steel bracelet with butterfly clasp

• Lugs: 13 mm

• Case back: crystal glass (see-through case back)

• Water resistance: 3 ATM

• Wrist Fit: 14.5 – 22 cm (adjustable)

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Conclusion: Visibly different. And that's precisely the point.

The Seiko Mod Nautilus with its NH70 movement is the perfect watch for anyone who wants to see and hear mechanical movements. It combines Japanese precision, open design, and high-quality materials into a watch that stands out from the crowd—without being loud. Ideal for collectors, connoisseurs, or newcomers to the world of skeletonized automatic watches.