Shop Seiko Mod Cases
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Picking the right Seiko modding case
Choosing the right NH35 cases is the backbone of reliable Seiko mods. Stick to 316L steel for strength, confirm screw-down crowns and fresh gaskets for waterproofing, and match bezel, crown and crystal specs to your other Seiko mod parts. A well-fitted case lets you swap in custom skeleton dials—superb alternatives to branded Seiko dials—and keeps your build tough for years.
Shop Seiko mod dials
Find The Perfect Seiko Mod dial
The dial defines the soul of your Seiko mods. Choose our sterile sunburst, sandwich, or skeleton dials—perfect drop-in Seiko mod dials for NH35 builds and a clean alternative to branded Seiko dials. Each piece lines up with OEM markers, glows with C3 lume, and pairs flawlessly with your other premium Seiko mod parts for a watch face that’s truly yours.
Featured collection
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Attention to details: Seiko Mod NH35 Hands
Upgrade your Seiko mods with our precision-cut Seiko mod hands—sword, Mercedes, and paddle styles that drop straight onto NH35/NH36 movements. Each set is lume-matched to our skeleton and sunburst dials, so colours stay consistent across all your premium Seiko mod parts. Heat-blued or brushed finishes let you tune the vibe from vintage diver to stealth field watch, giving your build the perfect finishing touch.
Automatic Watch Movements
Se alleMovements for Seiko Modding: From NH35 to NH72
Drive your Seiko mods with the rock-solid NH35/NH36 movements—24-jewel, automatic, hacking, and hand-wind ready. Each unit drops straight into our NH35 cases and aligns perfectly with all premium Seiko mod parts, from skeleton dials to custom hands. Choose factory-fresh or pre-regulated versions for smoother timekeeping and a bulletproof heart that keeps your custom build ticking for years.
Our mission
At Nomods, we’ve felt the same pain you have—countless hours spent chasing the perfect build, only to be let down by brittle crowns, sloppy dials, or scratch-prone crystals. Those frustrations pushed us to flip the script. Every component we design— from exact-fit NH35 cases to lume-rich skeleton dials and precision-milled bezels—undergoes real-world torture tests before it ever reaches your bench. Our mission is simple: deliver Seiko mod parts that not only look and feel premium but also unleash the full potential of the NH-series movements inside. Because when tolerances are tight, finishes are flawless, and gaskets seal true, your creativity—not part quality—sets the limit of what your next Seiko mod can become.
🧰 Shop Our Seiko Mod Cases – High quality and wristfriendly sizes.
View all Seiko Mod Cases »
🎨 Show our Seiko Mod Dials – Great alternatives to OEM Seiko Dials
Shop all Seiko Mod Dials »
🔧 See our Seiko Mod Hands for NH-movements
View all Seiko Mod Hands »
🌊 Don't forget the movement!
View all Seiko Movement for Watch Modding
Not ready to build yet, but want a taste of what seiko modding can offer? Browse our completed seiko mods here:
🌊SEIKO NAUTILUS MOD: View our skeleton watch inspired by Aquanaut
View the Seiko Mod Nautilus Skeleton in Silver »
🔍 ROYAL OAK MOD: Explore the Royal Oak 37mm Skeleton Mod
Explore the Steel Royal Oak Skeleton Mod »
Premium Seiko Mod Parts — Build the Custom Watch You’ve Always Wanted
Welcome to the one-stop shop for Seiko mod parts trusted by hobbyists and pro builders alike. Whether you’re fresh-fitting a sapphire crystal into an SKX or piecing together a full build from scratch, you’ll find every component here—precision-machined, quality-checked, and ready to drop into your project.
Why Choose Our Parts for Your Seiko Mods?
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Tight tolerances, zero guesswork – Every bezel, crown, and chapter ring is CNC-cut to OEM specs, so you spend time creating, not sanding or shimming.
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Curated inventory – From sterile dials to engraved case-backs, we stock only the mod essentials the community rates highest. No filler, no bargain-bin knock-offs.
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Real-world testing – We actively test our products and continually improve to make sure your build can truly last for years.
FAQs
A “Seiko Mod” refers to a custom Seiko watch that has been altered to match an individual’s style or functional needs.
Modifications can be purely aesthetic, such as changing the dial, case, hands, or bezel, or functional, such as improving movement accuracy or durability with features like water resistance. These modifications provide watch enthusiasts the opportunity to create a unique timepiece that fits their personal preferences and enhances their watch-wearing experience.
Seiko modding is a fun and creative way to customize your watch. If you’re just starting, you’ll need basic tools and parts like dials, braces and hands to personalize your timepiece. Explore our shop for compatible parts, and feel free to reach out for help identifying the right components or installing them. Our resources are here to make your modding journey easy and enjoyable!
Shipping from our workshop in Norway has an estimated delivery of 7-14 days worldwide.
Let customers speak for us
Excellent Quality and Customer Service
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.
B.S.
Nomods
Exactly what I was looking for
After years of research I finally found the 37mm case which is perfect in size. Excellent quality!
L.G.
Royal Oak 37mm Seiko Mod Case Silver
Perfect size, perfect platform.
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.
Ben Fugerer
Royal Oak 37mm Seiko Mod Case Black PVD
Great Dial!
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!!
Bill Beegan
Royal Oak Dial 28.5mm Rose gold
Love the case and love the company!
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!
Ben Fugerer
Royal Oak 37mm Seiko Mod Case Silver
Great Case & Service
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.
Garrett Canavero
Royal Oak 37mm Seiko Mod Case Silver
The Royal Oak
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.
Ankur Gaur
Seiko mod – Royal Oak 37mm Silver
What a case!
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!
Gio
Royal Oak 37mm Seiko Mod Case Silver
Great Case
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!
Aidan
Royal Oak 37mm Seiko Mod Case Silver
Very nice Case
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.
j.A.
Royal Oak 37mm Seiko Mod Case Silver
Very Happy
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.
Nico
Royal Oak 37mm Seiko Mod Case Silver
Seiko Daytona Platinum. Fantastisk kjøp
Kjøpte en klokke Sommer 2024 og kunne aldri vært mer fornøyd. Klokken sitter solid og komfortabelt på håndleddet. Ekstremt god service og veldig mye klokke for pengene. Anbefales
Otto
Nomods
Great finish, easy install
Great finish, easy install
Philip Mcneilly
Seiko Mod Hand - Royal Oak Silver
Perfect dial for oak style skeleton watch
Paired with the 37mm case this dial fit perfectly and looks great!
Philip Mcneilly
Royal Oak Dial 28.5mm (Inactive old)