Seikonaut / Nautilus Style Seiko Modding Case Ultrathin Gun Metal PVD
- Sapphire Crystal
- 100M waterproof
- 316L Stainless Steel
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 the 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.
Gun Metal Ultra Thin Seiko Modding Case
The Gun Metal Seikonaut case is designed for modders seeking a darker metallic finish within the Seiko Nautilus modding style. At 9.95mm with a closed caseback and 10.3mm with an open caseback, it is part of the ongoing effort to produce the thinnest Seiko modding cases worldwide.
Movement and Dial Support
This case is built for the most widely used Seiko movements: NH35, NH36, NH38, NH70, NH71, and NH72. It supports 30.8mm dials, ensuring precision fitment across skeleton, open-heart, or classic Seiko modding dials.
Nautilus Case Dimensions
The Seikonaut proportions measure 40mm (10H–4H) and 38mm (12H–6H), providing an ideal balance of wrist presence and wearability.
Superior Materials and Plating
Crafted from 316L stainless steel, the case is finished with 20 micron Gun Metal plating, more than double the thickness of common aftermarket Seiko mod parts. This ensures a rich finish with strong durability.
Crystal and Water Resistance
The sapphire crystal is available in clear or blue AR coatings, while the case is water resistant to 50M, providing both luxury and reliability.
Why Choose Gun Metal?
Gun Metal provides a unique aesthetic within Seiko modding—darker than silver but less stark than black. For Seiko modders aiming for a distinctive Nautilus-inspired project, this case offers both the proportions and durability required for a top-tier Seiko mod build.
