Silver Seikonaut Case | Ultra Thin Seiko Mod NH35 NH72

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

Nomods Seikonaut / Nautilus Style Seiko Modding Case Ultrathin Silver

$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 Ultra-Thin Silver Seikonaut case is engineered with a singular purpose — to push Seiko modding design to its thinnest form. Measuring only 9.95 mm (closed) and 10.3 mm (open caseback), it captures the clean proportions of luxury integrated-bracelet watches while maintaining full Seiko mod compatibility. Built for NH35, NH36, NH38, NH70, NH71, and NH72 movements, it fits 30.8 mm dials, enabling both skeleton and classic Seiko mod builds.

• Dimensions: 40 mm (10H–4H) × 38 mm (12H–6H)
• Material: Solid 316L stainless steel, brushed and polished finish
• Crystal: Sapphire with clear or blue AR coating
• Water Resistance: 50 m
• Includes: Case, Caseback (solid or open), Crown, Gaskets

Unplated and enduring, this stainless steel Seikonaut case provides a timeless foundation for modders seeking precision, strength, and minimal thickness in their next Seiko Nautilus-inspired project.

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

Clear vs Blue Anti-reflective Coating

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Customer Reviews