Rose gold watch on a wrist with a blurred background

Prebuilt Seiko Mods

Professionally assembled.

Welcome to Nomods, your home for Seiko modding.

We create and curate everything from prebuilt Seiko mods — ready-to-wear custom watches inspired by luxury designs — to a full catalog of Seiko mod parts for DIY builders. Whether you’re searching for a Royal Oak, Nautilus, Aquanaut, or Petrichor mod, or planning your own build with dials, cases, crystals, and hands, we’ve got you covered. Based in Norway and shipping worldwide, NOMODS delivers both craftsmanship and choice for every watch enthusiast.

Ultra thin

We set out to develop the thinnest Seiko Modding Case in the world at 9.95mm and certainly the thinnest Nautilus case for Seiko Modding!

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Curved caseback

With the curved caseback the middle part of the case sits a lot lower on the wrist utlimately making the design feel even slimmer.

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Slim profile

These two elements allow for a super slim profile and premium feeling to the watch. This is a breakthrough in case design, challenging Seiko movements' main limits!

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Frequently Asked Questions

What is a Seiko mod?+
A Seiko mod is a custom watch built using a Seiko or NH movement combined with aftermarket parts such as cases, dials, hands, and crystals. Mods can be bought prebuilt or created by DIY modders.
Do you sell both prebuilt Seiko mods and parts?+
Yes. NOMODS offers ready-to-wear Seiko mods and a full catalog of Seiko mod parts for DIY builders. You can choose to buy a finished watch or build your own.
Are your Seiko mods genuine Seiko watches?+
Seiko Mods must not be mixed up with original Seiko watches. All NOMODS watches use genuine Seiko/NH movements (e.g., NH35/NH36, NH70/71/72). The cases, dials, crystals, and straps are high-quality aftermarket components assembled by experts.
Do you ship worldwide?+
Yes. We ship worldwide from Norway with secure, tracked delivery options. Shipping times vary by region, and all orders are carefully packed for safe arrival.
Are Seiko mods water resistant?+
Many builds are designed for water resistance, but it is only guaranteed if the watch has been pressure-tested and rated. Always check the specifications on each product page.
Can I return or exchange my order?+
Yes. We accept returns and exchanges on unused items within the stated return period. Please see our Refund Policy for details.

craftsmanship & trust

Built by Modders, for Modders

Global reach & localization


Worldwide Shipping from Norway

technical quality & reliability

NH Movement Expertise & High-Quality Fit