Naut Mod - Black (Open Heart)

The Naut Mod Black Open Heart pairs the all-black intensity of the Blacked Out variant with a dial cutout that frames the NH38 automatic movement in motion. On a dark dial the open heart window creates a striking depth — the visible front mechanism against the black surface, mechanical and graphic at once. It is an integrated-bracelet sports watch Seiko Mod for the enthusiast who wants to see their movement working, without giving up the coherent monochrome look. Every piece is hand-assembled by MedoMods and ships EU-wide without customs complications.

Key Specifications

• 41 mm stainless steel case – versatile size, works on most wrist sizes

• Automatic Seiko NH38 movement – self-winding, hacking seconds, hand-windable; movement visible through the open-heart aperture

• Sapphire crystal with Super-LumiNova – scratch-resistant glass; luminous hands remain readable in low light

• Screw-down crown & 5 ATM water resistance – sealed and protected for everyday conditions

• Adjustable integrated stainless steel bracelet with butterfly safety folding clasp – flush fit between case and bracelet, secure butterfly clasp

• Case back: exhibition window – a second view of the NH38 from the back

Two Windows Into the Movement

With the exhibition case back you get the full experience: the NH38 front mechanism visible from the front through the open heart, and the rotor visible from the back through the sapphire case back window. The black dial makes the cutout stand out more sharply than on lighter dials — the contrast between the dark surface and the moving parts beneath is immediate and honest. This is a Seiko Mod that rewards people who understand what they are looking at, built with the attention to detail that only hand-assembly can deliver. Shipped, ready to wear the day it arrives.

Ordering and delivery

• Every watch comes with a 2-year warranty from delivery. It covers manufacturing defects and functional problems under normal use. It doesn't cover scratches, damage from opening the watch, or water damage.
• 10–12 days after ordering
• 14-day withdrawal period. The period starts on receipt. For deliveries to the UK, US and Australia, we offer 14-day returns.