Seiko mods are custom-built watches made by modifying genuine Seiko timepieces with aftermarket or original parts. Enthusiasts swap dials, bezels, hands, cases, and movements to create completely unique designs — often mimicking luxury styles or expressing personal taste. The result is a fully personalized watch that costs a fraction of a Rolex or Omega.
Want to go deeper? Explore our full Seiko modding blog series.
Discover Seiko mods inspired by the legendary AP Royal Oak — featuring sharp angles, integrated bracelets, and a modern industrial edge. Built with reliable NH72 movements and finished in brushed steel, silver, or rose gold tones. Designed to turn heads.
Discover our signature Seiko Nautilus mods — custom-built watches inspired by the iconic Patek design, powered by reliable automatic NH72 movements. Choose between brushed silver, gold, or two-tone styles and wear a timepiece that stands out.
Seiko mods offer the perfect fusion of reliability, creativity, and affordability. Whether you're a collector, a first-time buyer, or a design enthusiast, modded Seikos give you a unique watch experience that rivals luxury brands — without the premium price tag.
Fully Customizable. Mix and match dials, bezels, hands, and straps to create something uniquely yours.
Powered by Trusted Movements. Most of our mods use the NH35 or NH72 automatic movement — known for durability and accuracy.
Luxury Look, Honest Price. Get the aesthetics of high-end watches without the $5K–$50K price tag.
Built by Hand, Not Mass-Produced. Every build is assembled and quality-checked by passionate modders.
Distinct Design Language. Choose styles inspired by iconic watches — from the Nautilus to the Royal Oak— while making it truly personal.
Fast, Worldwide Shipping. Built and shipped from Norway, with real-time support if needed.
Join hundreds of watch fans who have bought their perfect build through Nomods.
Whether you're starting from scratch or upgrading an existing build, we offer seiko mod parts for every stage of your modding journey. From dials to bezels, our components are trusted by hobbyists and pro builders alike.
A “Seiko Mod” refers to a custom built watch using a Seiko movement.
A Seiko Mod can either be a original Seiko watch that has been altered, or a custom watch built from scratch using compatible parts for Seiko Movements such as the NH35 or NH72.
Absolutely! Our mods are based on genuine Seiko movements, ensuring the highest quality and reliability as a foundation for your custom watch.
To maintain your Seiko mod, keep it clean, avoid extreme shocks. We also provide care instructions specific to your custom watch.
Yes, Seiko mods are perfectly legal. Modding involves using aftermarket parts to customize your watch, but it does not imply counterfeit or fake branding.
Our watches are without a counterfeit "Seiko" logo and you can be confident of our watches purity!
Yes, you can! We offer customizable options to help you design a watch that matches your style and preferences. Browse our parts to build it yourself or contact us for a custom design!
Yes, we provide a warranty on our modding services and parts. If you encounter any issues, simply contact us, and we’ll be happy to assist.
The time to complete a Seiko Mod on average, is takes 2-4 weeks, including assembly and delievery.
Yes, we ship Seiko mods worldwide. Shipping times and costs may vary depending on your location, but we ensure safe delivery wherever you are.
I am creating a custom watch build for my brother who works at a gym. I wanted something equal parts sport and elegance and the Petrichor meets and exceeds my standards for both. Really solid build quality with exceptional finishing, and a comfortable micro-adjustable bracelet to boot. I will be buying from NoMods again.
Fantastic quality. Looks exactly like the image. Looks great.
I recently ordered a watch case from this company and was blown away by the quality. The craftsmanship is outstanding — solid, well-finished, and clearly made with attention to detail. It exceeded my expectations in every way.
What impressed me even more was their customer service. There was a small issue with the shipping, but they handled it quickly and professionally. They responded fast, kept me updated, and made sure everything was resolved without any hassle.
It’s rare to find a company that delivers both top-tier products and great support. Highly recommended if you’re looking for premium watch modding cases and a team that truly stands behind what they sell.
After years of research I finally found the 37mm case which is perfect in size. Excellent quality!
I’ve always loved the look of the Royal Oak, really any Genta case design. I’ve been a fan of his work for as long as I can remember. When I came across the Nomods website I was blown away. Not only did they sell one of my favorite case designs of all time, they sell it in a wide variety of color options and what I consider the perfect size. There are other Royal Oak cases out there but this is the only one in 37mm that takes a 28.5mm dial with zero modifications. I’m very excited to see what Nomods has planned for the future with new releases. They are doing things no other mod store is doing.
Mathias from Nomods is excellent, and very responsive. I had a few questions about the product and he got back to me right away and was very helpful. I ended up buying the 37mm AP case and skeleton dial and they are beautiful and well made. I appreciate the quality and customer service!!
Shopping was fast to the USA. The case is of great quality. Nobody is doing the RO case in 37mm which fits my wrist so much better than those big ones on AliX. Not to mention the quality is worlds better than AliX. I really look forward to what they have coming down the pipeline. I see they have a new design in the works that looks incredible and very unique. I now follow them closely on Instagram so I don’t miss a thing. Can’t wait for what’s next!
The case is perfect and its great to find a Royal Oak style case in a smaller size. Had a self imposed issue with case back screws and after emailing the nomods team they got back to me extremely fast with a solution and replacements. Couldn't be happier with the product and the service.
I just received the watch. It's amazing. Much better in person than it looks in the pictures. It came with a custom box and a tool for adjustments. I asked Mithas to adjust it to my wrist size, and it was perfect. I ordered the 37mm, and it's perfect for my 7-inch wrist. As soon as I wore the watch, it looked quite elegant. I highly recommend it. If you like what you see in the pictures, you are going to love the watch.
The case is really great built and the tolerances are great, there a couple of hairlines on the bracelet but it's not a big deal. The finishing is in line with the asking price and the extra set of screws is complete with every replacement.
Overall this is a great purchase and Mathias was super kind during the ordering phase. Now my AP collection is complete!
Quality oak style case very impressed. Packaging was nice and secure, comes with useful tools as well. Only point of criticism is no half link but was told these will be available in march!
Nomods was very helpful with the question i got.
Delivery was a little long due too christmas and new year.
Quality of the product blow mymind nothing to compare on what you found elsewhere, the finish, the saphire crystal, bracelet can be adjusted easely.
Movement dial and hands where easy to assemble.
Most expensive case I've ever bought, but im very very happy. One screwhead broke of while adjusting the bracelet, but I got a new link + screw without any problems. Absolutely would buy again.
