Two-Tone Seikonaut Case | Seiko Nautilus Modding NH35–NH72

Name: Two-Tone Seikonaut Seiko Mod Case – NH35/NH7x (Ultra-Thin)
Brand: Nomods
Price: 149.0 USD
Availability: InStock

Nomods Seikonaut / Nautilus Style Seiko Modding Case Ultrathin Two-tone Silver Gold

$149.00

Tax included.

Caseback

Exhibition caseback

Solid caseback

Anti-Reflective Coating

Clear AR

Blue AR

FREE SHIPPING OVER 99$

In stock, ready to ship
Backordered, shipping soon

Orders are processed within 1–3 business days (excluding weekends and holidays).

We accept returns/exchanges according to our policy for unworn items in original condition. Custom changes may have different terms — contact us for questions

Note: This is a pre-order of the case only. Final production may vary slightly from current specifications. The thinnest Seiko mod case on the market is 9.96 mm. While our design targets a slimmer profile, if the final thickness is slightly higher and does not set a new record, this will not qualify for a refund.

The Nomods Two-Tone Seikonaut case brings the refined proportions of luxury integrated-bracelet designs into the Seiko modding world. Measuring just 9.95 mm (closed) and 10.3 mm (open caseback), it delivers an exceptionally slim and balanced Nautilus-inspired profile. Compatible with NH35, NH36, NH38, NH70, NH71, and NH72 movements, it fits 30.8 mm dials for seamless alignment across skeleton, open-heart, and traditional Seiko mod builds.

• Dimensions: 40 mm (10H–4H) × 38 mm (12H–6H)
• Material: 316L stainless steel with 20-micron two-tone plating (silver & gold)
• Crystal: Sapphire with clear or blue AR coating
• Water Resistance: 50 m
• Includes: Case, Caseback (solid or open), Crown, Gaskets

With its contrasting silver and gold finish, this two-tone Seikonaut case stands out as a statement piece for modders seeking both elegance and technical precision in their Seiko Nautilus builds.

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Other Colors

FAQs

Nomods is based in Oslo, Norway. We offer shipping from our workshop here, or directly from our factory depending on buyers location. Read more about this in our shipping policy!

We do not offer counterfeit logos on our products.

Contact us for a customized logo

If you are having a hard time removing the screws from the bracelet, take the case and bracelet under some warm soapy water and wiggle each link back and forth. This will clean out residue from production which makes the screws easier to remove and improve the bracelet quality over all

AR coating stands for Anti reflective coating and reduces the reflection in the crystal enhancing visibility. Blue AR has a slightly tinted reflection while Clear AR has not.

Scroll down to see the comparison!

No it does not! Our 37mm Royal Oak Seiko Modding case arrives as one complete case, and is ready to house a movement straight from the box.

In order to make this Seiko Mod Case as thin as possible, there is limited room in the back of the case. Therefore some custom NH35 rotors do not fit. Pay close attention to the respective rotor. Does it exceed the height of the middle screw? If yes then it may be too thick for this case.

We recommend a 28.5/29mm dial for our 37mm Royal Oak Case. The typical 31.8mm mod dials that many Royal Oak Mod Cases use are too big.

Clear vs Blue Anti-reflective Coating

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Two-Tone Seikonaut Seiko Mod Case – NH35/NH7x (Ultra-Thin)

Clear vs Blue Anti-reflective Coating

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