Nomods Custom Seiko Nautilus Build – Skeleton NH72 Build in Black PVD, Gray Strap

Seiko Aquanaut Style Watch – Gold Accents on Black PVD Case with Green Strap

$290.00
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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 – Black Skeleton Seiko Mod with Silver Dial & Gray Strap (40mm)

This 40mm Seikonaut brings modern minimalism to the world of modding. With a matte black PVD case, brushed silver hands and indexes, and a neutral gray rubber strap, this build is all about mechanical clarity and clean execution.

Powered by the NH72 skeleton movement, the dial is stripped back to expose the inner workings — offering a full display of the gear train, balance wheel, and bridge structure. It delivers far more mechanical expression than a standard Seiko dial, or even a partial Seiko Nautilus open heart cutout.

The result is a mod that feels balanced and grounded. The cool-toned palette and skeletonized display offer presence without flash, making this build a go-to for those who love detail but lean toward understated design.

Compatible with all top-tier Seiko mod watches components, this Seikonaut is proof that contrast and complexity don’t need to be loud — just well-executed.

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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