Nomods Custom Seiko Nautilus Build – Rosegold Case, Rosegold Dial, Black Strap

Custom Seiko Nautilus Build – Rosegold Case, Rosegold Dial, Black Strap

$290.00
/
Tax included.
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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

Seikonaut – Rosegold Skeleton Seiko Mod with Black Strap (40mm)

This Seikonaut configuration pairs a warm rosegold case with a stealthy black rubber strap, creating a clean, modern contrast that feels luxurious yet wearable. Designed around a 40mm integrated Nautilus-style case, it’s powered by the Seiko NH72 skeleton movement, which reveals the golden mechanics beneath through a fully open dial layout.

Unlike a traditional Seiko Nautilus open heart that offers just a peek into the movement, this build goes all-in — exposing the entire gear train, balance wheel, and architectural bridges. It’s not just a detail; it’s the whole design.

This setup replaces your typical Seiko dial with a full mechanical display that brings life and depth to the watch — giving it presence and personality with every turn of the wrist.

Compatible with top-tier Seiko mod watches components, this Seikonaut offers perfect proportions, a reliable movement, and a high-impact aesthetic that’s anything but standard. For modders seeking a bold mechanical style with luxury overtones, this is a top-tier choice.

Disclaimer: This is a custom-built watch assembled by us using genuine TMI (Time Module Inc.) movements, a subsidiary of Seiko Instruments Inc., part of Seiko Group Corporation.
This product is not an official Seiko watch and is not endorsed by or affiliated with Seiko Group Corporation or its subsidiaries.

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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