Nomods Royal Oak 37mm Seiko Mod Case Gun Metal Gray
Nomods Seiko mod – Royal Oak 37mm Gunmetal
Nomods Royal Oak 37mm Seiko Mod Case Gun Metal Gray
Nomods Seiko mod – Royal Oak 37mm Gunmetal

Gunmetal Royal Oak Seiko Mod Case – 37mm NH35/NH72

$130.00
/
Tax included.
Color
Anti-Reflective Coating
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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

The Nomods Royal Oak 37mm Seiko Mod Case in Gunmetal delivers a darker, more industrial take on the iconic integrated design. With its stealthy brushed coating, compact 37 mm profile, and bold geometric lines, it’s made for Seiko modders creating AP skeleton-style or modern monochrome builds. Compatible with NH72 and NH35 movements, it supports 28.5 mm Seiko dials and includes a sapphire crystal with your choice of clear or blue AR coating.

• Dimensions: 37 mm × 48 mm × 11.2 mm (11.0 mm without crystal)
• Material: 316L stainless steel with gunmetal finish
• Crystal: Sapphire (clear or blue AR options)
• Water Resistance: 100 m
• Compatibility: NH35, NH38, NH70, NH71, NH72 movements
• Dial Fit: 28.5 mm
• Includes: Case, Spacer Ring
• Hand Fitment: Standard-length hands (~12.5 mm)

Refined yet bold, the Gunmetal Royal Oak 37mm case is designed for modders who want a premium Seiko mod base with a darker aesthetic — merging durability, luxury-inspired geometry, and precise fitment in one versatile case.

Other Colors

Clear vs Blue Anti-reflective Coating

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.

What Inspires This Case

The Gunmetal Royal Oak 37mm Seiko Modding Case started as an experiment in surface treatment. The goal was to take the clean, architectural lines of the Seikoak design and give them a darker, more utilitarian feel — something closer to industrial titanium than luxury steel. The brushed coating has a muted sheen, which lets the facets catch light without appearing polished or loud.

This color choice came from wanting a version that feels functional first — the kind of finish that looks even better once it’s been worn a while. It’s built for Seiko modders who lean toward stealthy builds: smoked sapphire, skeleton NH72 movements, and blacked-out chapter rings. Despite the darker tone, it keeps the same crisp geometry and integrated-lug proportions that define the Seiko Royal Oak shape.

Why 37mm Is Perfectly Proportioned

The 37mm case size wasn’t chosen by accident. It’s the point where 28.5mm Seiko dials line up exactly with the rehaut, keeping the dial centered without creating excess gap. During testing, we found that a fraction larger made the case feel loose around the dial, while smaller designs cut too close and disrupted the clean visual flow.

In use, this Seikoak Mod case wears compact, balanced, and technical — ideal for builders who want their watch to feel cohesive rather than oversized. It supports all standard Seiko mod parts (NH35, NH36, NH72), maintains the correct hand clearance, and keeps the dial spacing precise. It’s a dark, balanced foundation for any Seiko Royal Oak mod that values both restraint and detail.