The Slimmest Seiko Mod

At, we’re dedicated to bringing you the latest and greatest in the world of Seiko modding. Today, we’re excited to introduce you to a remarkable product that’s generating buzz in the modding community: Lucius Atelier’s Ultra Thin Explorer Watch Case designed exclusively for NH Movements, now available for pre-order.

Discover the Pinnacle of Slimness with the Slimmest Seiko Mod

Lucius Atelier has truly outdone themselves with this extraordinary creation. The Ultra Thin Explorer Watch Case boasts an astonishingly slim profile, measuring just 9.96mm in thickness when equipped with a solid caseback. To put this in perspective, an NHxx movement typically has a thickness of 7.59mm. That means the sapphire crystal, case, and tolerance for hands in this case add up to a mere 2.37mm! Yes, you read that right. This is, without a doubt, the slimmest Seiko mod available for NH movements.

Even if you opt for the sapphire caseback, the thickness remains impressively low, at less than 11mm.

What’s Included in the Package for Your Slimmest Seiko Mod?

When you pre-order the Lucius Atelier Ultra Thin Explorer Watch Case, you’re in for a treat. The package includes a flat double-sided coated clear AR sapphire, allowing you to appreciate the inner workings of your watch. You can choose between a solid or sapphire caseback based on your preferences, and a screw-down crown is also part of the package.

Compatibility Galore for Your Slimmest Seiko Mod

This watch case has been meticulously crafted to accommodate all 28.5mm dials, SKX013 crowns, SKX013 chapter rings, and the Type M NH movements. The crown, at 7mm, provides an excellent grip and is available in a knurled design, which offers superior grip over coin edge crowns. In fact, knurled 7mm crowns will not only feel better in your hand but also create an optical illusion of slimmer aesthetics.

Water-Resistant and Durable – Ideal for Your Slimmest Seiko Mod

The Lucius Atelier Ultra Thin Explorer Watch Case doesn’t just offer sleek aesthetics; it’s built to last. With a water resistance rating of 50m, this case ensures durability alongside its impressive design. Whether you’re caught in the rain or simply looking for a watch case that can handle everyday wear, this case has got you covered.

Important Note for Your Slimmest Seiko Mod:

It’s important to note that this case is specially designed for Type M of NH35, NH36, NH38, NH70, NH71, and NH72 movements. Type L of these movements will not fit due to low tolerance/space between the hands and sapphire. Therefore, this case is recommended for professional watchmakers and highly skilled, experienced modders with a great level of finesse.

Your Guide to Building the Slimmest Seiko Mod

At, we’re excited to announce that we’ll be providing a comprehensive guide on how to create your own custom slim explorer seiko mod using the Lucius Atelier Ultra Thin Explorer Watch Case. Stay tuned for detailed instructions, tips, and inspiration to help you make the most of this exceptional case and achieve the slimmest Seiko mod.

Visit Lucius Atelier’s Website to secure your pre-order today. Stay tuned for more updates and our upcoming guide on how to make the most of this exceptional case and achieve the slimmest Seiko mod.

Make sure to visit for more updates, guides, and insights into the world of Seiko modding. We’re here to keep you informed and inspired as you embark on your journey to create the slimmest Seiko mod.

Stay tuned for more exciting updates, and as always, happy modding!

You can get the Case here at Lucius Atelier.


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