Explore the full world of Seiko mod parts at NOMODS — from components like dials, hands, and crystals to entire case families (Royal Oak, Nautilus, Petrichor, Aquanaut). Whether you’re building with NH35/NH36 or skeleton NH7x movements, you’ll find curated, tested parts with clear compatibility notes. Use this page to navigate by Component, Style, Movement, or Case Size.
Browse by the individual Seiko mod parts you need — from dials and hands to cases, crystals, straps, and tools. Each component is organized for easy navigation and guaranteed compatibility with NH-series movements.
Explore parts grouped by iconic case styles like Royal Oak, Nautilus, Petrichor 37 mm, and Aquanaut. Each collection brings together compatible dials, hands, crystals, and straps for that specific look.
Find parts designed for specific Seiko NH movements — from the popular NH35/NH36 to the NH70/71/72 skeleton series. This ensures you only see components that fit your chosen movement family.
Choose parts tailored for 37 mm compact builds or larger 41 mm cases. Case size impacts both dial diameter and wrist presence, so start here if you’re deciding between a smaller or bolder watch build.
Use this quick guide to match movements, dial diameters, and case sizes in your Seiko mods. Always double-check product notes for exact specs — especially with skeleton builds and style cases.
| Movement | Dial Diameter | Common Case Sizes | Notes |
|---|---|---|---|
| NH35 / NH36 | 28.5 mm |
37 mm (Petrichor, Royal Oak 37) 39–41 mm (Royal Oak 41, Aquanaut) |
Most popular Seiko mod movement. 28.5 mm is the standard dial size. |
| NH70 / NH71 / NH72 (Skeleton) | 28.5 mm (skeleton cut-outs) | Varies by case — Royal Oak & Aquanaut skeleton builds | Shares hand sizes with NH35/36, but check dial feet & clearance. |
| NH34 (GMT) | 28.5 mm | 39–41 mm GMT-style cases | Requires GMT hand sets. Confirm case + dial compatibility before ordering. |
| NH38 (No Date) | 28.5 mm | 37 mm & 39 mm builds | Same fit as NH35/36 but without a date window. Perfect for clean dials. |
Bought the case. It is really a unique product that doesn't exist anywhere else in the market. For anyone who likes Royal Oak and like a smaller footprint, this is an unmissable offering. Thank you Nomods.
Everything was perfect. Shipping was fast and the product is of very good quality. In my opinion this is a the best Royal Oak mod you'll find on internet
Absolutely love the watch, it look realy good and adjusting the band was really easy
Awesome watch! Excellent piece from these guys. This is the 3rd piece and I have never been let down:
Really well made, very happy with the product.
Very highly quality RO homage case. 37mm is a perfect fit for smaller wrists.
This is the perfect size for this style of case. The quality of the cases is top-notch, they feel and look excellent. Additionally, Mathias from Nomods is also very friendly and professional and helped me out with all my questions and customization requests.
Perfect size, perfect size case with the bezel being the right size. It is not too thick or too narrow, it is just right
Very nice case and very good quality
Nice seller
