We are NOT authorized Seiko dealer! We are individual workshop specialized in watch modding and prototyping to manufacturing!
Free International Shipping

Exclusively Crafted by Seiko-Mod.shop
What truly separates these Grand Seiko Carbon watches from others on the market is exclusivity.
These models are custom-made specifically for Seiko-Mod.shop and are not sold by any other store, marketplace, or brand.
You are not buying a generic mod or a watch assembled from widely available parts. Instead, you get:
This exclusivity makes each watch a collector-grade custom piece, not just another Seiko mod.
The world of custom watches is evolving fast, and one of the most searched and talked-about trends today is Grand Seiko Carbon. Combining advanced carbon materials with proven Seiko movements, these watches offer a rare balance of performance, aesthetics, and exclusivity.
What makes this even more special is that Grand Seiko Carbon watches featured in this collection are designed, assembled, and sold exclusively by Seiko-Mod.shop. These are not mass-market products — they are unique custom creations you won’t find anywhere else.
The term Grand Seiko Carbon is commonly used to describe high-end, Grand Seiko–inspired custom watches built with carbon fiber cases and reliable Seiko automatic movements. While not factory Grand Seiko models, these custom watches take inspiration from Grand Seiko’s design philosophy — precision, balance, and refined details — and merge it with modern materials.
Carbon fiber changes everything:
Each carbon case has its own natural pattern, meaning no two watches look exactly the same.
Carbon Fiber Case: Performance Meets Design
One of the defining features of the Grand Seiko Carbon concept is the full carbon fiber case.
Why carbon matters:
Carbon fiber also perfectly complements the clean, minimal, Grand Seiko–inspired dial layouts used in these custom watches.
Reliable Seiko Automatic Movement
At the heart of every Grand Seiko Carbon watch from Seiko-Mod.shop is a Seiko automatic movement, most commonly the NH35.
Why this matters:
This ensures that while the exterior looks bold and modern, the internal mechanics remain trusted, robust, and practical.
Sapphire Crystal for Everyday Protection
All Grand Seiko Carbon custom watches are equipped with sapphire crystal glass, a must-have feature in premium watches
Benefits include:
This makes the watches suitable not only for special occasions but also for daily wear.
A Unique Watch You Won’t See Everywhere
In a market flooded with identical designs, Grand Seiko Carbon watches from Seiko-Mod.shop stand apart. These watches are created for enthusiasts who want:
You’re not following a trend — you’re wearing a statement.
Final Thoughts
The Grand Seiko Carbon concept represents the future of custom watchmaking: advanced materials, proven mechanics, and exclusive availability. When you purchase from Seiko-Mod.shop, you’re investing in a watch that is not available anywhere else, designed for those who appreciate detail, quality, and individuality.
If you’re looking for a carbon-case custom watch inspired by Grand Seiko aesthetics, this collection delivers a rare blend of luxury, performance, and exclusivity.
We are NOT authorized Seiko dealer! We are individual workshop specialized in watch modding and prototyping to manufacturing!
Seiko Mod Shop is one of the world's leading service companies for the customization and personalization of Seiko watches. An experienced team of specialists transforms from the bracelet to the dial - according to individual customer requirements. All our designs have Seiko automatic or quartz movements inside. Also upon request, we can discuss any other modifications and an individual movement.
The manufacturing process of a Seiko Mods is complex and requires great attention to detail. First, the basic watch to be modified must be chosen, along with the parts that will be used to customize the design. Modifications can include changes to dials, bezels, bracelets, crowns, indexes, cases and even movements to make in unique. All depends from customer choice.
The only thing that will always be in our watches is Seiko movements.
Yes we can! Feel free to contact us via email: support@seiko-mod.shop
We have own factory and verified partners. We are absolutely not limited by anything any idea can be realized. We can make also your Own brand watches from zero.
A pre-order is an order placed for an item that hasn’t been released or is not currently in stock. They’re shipped to the customer once available. Pre-orders allow customers to order products before they are available.
Our customers have 24 hours to change/cancel an order.
Please contact us immediately by email: [email protected] ; if you need to make any changes or cancel your order.
For order canceling we charge additional fee 35 USD per each order.
If more than 24 hours have passed, due business specification we cannot issue order cancel/change, as all of our products are exclusively on pre-order - we order all the necessary spare parts for each client individually.
Watches with express delivery - delivery can not be canceled, because we ship them ASAP
Once your order has shipped, you will receive tracking information via email. If you haven’t received an email, please contact us and we will resend you the tracking information.
New tracking numbers usually take about 24 hours to activate from the time you receive your shipping confirmation. If it’s been more than 24 hours and your tracking number still isn’t working, contact us and we’ll help ensure you get your package!
We ship within 35 business days after placing an order. Delivery takes about 30 business days, all depends from your country and post office workload. But in practice we deliver orders faster.
We are not responsible for Import duties, but we can help and provide smaller invoice to avoid big tax payment
It’s a custom made items done on pre order. All sales final, items are sold as is. Final sale items cannot be returned, exchanged. No warranty and returns.
CONTACTS
If you’re looking for something unique, we will create a watch just for you!
Please contact us for a quote on your specific project.
Seiko Mod Shop © 2021