Nomods Seikonaut / Nautilus Style Seiko Modding Case Ultrathin Silver

$149.00

Tax included.

Sapphire Crystal

100M waterproof

316L Stainless Steel

Caseback

Exhibition caseback

Solid caseback

Anti-reflective Coating

Clear AR

Blue AR

We offer free shipping directly from the factory! This way we can ensure fast delivery at a reasonable price.

37mm
11.6mm thick (Including glass)
Domed Sapphire Crystal
100M waterproof
316L Stainless steel
Fits NH35, NH38, NH36, NH70, NH71, NH72 etc...

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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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!

No chapter ring is needed! Our Petrichor Seiko Modding case as one case and it ready to be built with!

In order to make this as thin as possible, there is limited room in the back of the case. Therefore some custom 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.

Our Petrichor Seiko Modding Case houses 28.5/29mm dials!

Other colours

Sale

Silver Petrichor Seiko Mod Case – NH35

$195.00 $159.00 Save $36.00

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

$149.00

Sale

Nomods Petrichor Seiko Mod Case Gun Metal PVD

Gunmetal Gray Petrichor Seiko Mod Case – NH35

$195.00 $159.00 Save $36.00

Sale

Nomods Petrichor Black PVD Seiko Mod Case

Black PVD Petrichor Seiko Mod Case – NH35

$195.00 $159.00 Save $36.00

Original Design

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

Our Petrichor case is designed and developed by us. We are proud to offer unique designs to the Seiko Modding Community and look forward to seeing your creative ideas paired with the Petrichor case!

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

Other colours

Original Design