NAUTIKO | SKELETON

Seiko Mod Nautilus with NH70 – Visible mechanics meet iconic design

The Seiko Mod Nautilus with its transparent dial pays homage to one of the world's most iconic watch cases – but with a bold, modern twist. Inside this 41mm automatic timepiece beats the skeletonized Seiko NH70 movement, visible through the open-design dial and crystal-clear exhibition case back. The result: a watch that perfectly blends mechanical fascination with timeless elegance.

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

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Open mechanics, open statement

The highlight of this version is undoubtedly the open dial, which deliberately offers a glimpse of the automated inner workings. The skeletonized design visually emphasizes the movement of the clockwork, making every second an experience. The delicate decoration of the bridges and gears provides a striking contrast to the clean case design – a true statement piece for mechanical watch 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 meticulously satin-finished and polished. Its balanced shape draws inspiration from an iconic design, yet remains distinctive enough to be considered a modern interpretation. At just 12 mm thick, the watch has a pleasingly slim profile and sits comfortably on the wrist – even under tight shirt cuffs.

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Movement: The Seiko NH70 automatic movement

Inside beats Seiko's skeletonized NH70 caliber – a reliable, low-maintenance automatic movement with a power reserve of approximately 41 hours. The movement winds itself automatically through arm movements or can be wound manually via the screw-down crown. As it is an "open heart" movement, the movement can be observed directly on the dial – a fine detail that will appeal to more than just technology enthusiasts.

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sapphire crystal & Luminova for maximum everyday usability

Scratch-resistant sapphire crystal protects the delicate mechanism – with additional anti-reflective coating for optimal readability. The hands and indices are coated with Luminova, ensuring reliable legibility even in the dark. Water resistance to 3 ATM 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 into the case. It's adjustable to fit wrists from 14.5 to 22 cm. The butterfly clasp ensures secure wear – understated yet reliable. With 13 mm lugs, the watch has a modern and sporty look.

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Technical details at a glance

• Housing diameter: 41 mm (excluding crown)

• Case height: 12 mm

• Factory: Seiko NH70 automatic movement (skeletonized)

• Power reserve: approx.41 hours

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

• Luminous material: Luminova (pointer) & (Indices)

• Housing material: 316L stainless steel

• Crown: Screwed together

• Bracelet: Stainless steel bracelet with butterfly folding clasp

• Lugs (band kick-off): 13 mm

• Case base: Crystal glass (viewing base)

• Waterproof rating: 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 NH70 movement is the perfect watch for those who want to not only hear but also see the workings of mechanical movements. It combines Japanese precision, an open design, and high-quality materials into a timepiece that stands out from the crowd – without being loud. Ideal for collectors, connoisseurs, or newcomers to the world of skeletonized automatic watches.