Royal Oak Seiko Mod

About

Royal Oak-style Seiko mods from Nomods — available as prebuilt watches or individual parts for custom builds. Choose between the ultra-thin 37 mm case (9.95 mm thick, integrated bracelet) and the larger 41 mm case (12.2 mm, rubber strap). Both sizes run NH35 automatic or NH72 skeleton movements, with sapphire crystals and 100 m water resistance across the range. The collection includes complete watches in skeleton and waffle dial configurations, plus standalone cases, 28.5 mm and 30.8 mm dials, V1 and V2 hands, straps, and accessories. Fits: NH35, NH36 (solid dial) · NH72, NH70, NH71 (skeleton) · Case sizes: 37 mm (V2) and 41 mm · Dial sizes: 28.5 mm (41 mm case) and 30.8 mm (37 mm V2 case) · Watch out: The 37 mm V2 case uses 30.8 mm dials, not the more common 28.5 mm size. The 41 mm case uses standard 28.5 mm dials. Check your dial size before ordering — read our dial size guide for a full breakdown. How to Choose Your Royal Oak Seiko Mod The Royal Oak collection covers a wide range of builds. Here is how to narrow it down: 37 mm vs 41 mm: The 37 mm is the thinner, dressier option at 9.95 mm with an integrated steel bracelet — it wears closer to a luxury daily watch. The 41 mm is a bolder, sportier build at 12.2 mm on a rubber strap, with more wrist presence. If you want something that disappears under a shirt cuff, go 37 mm. If you want something that stands out, go 41 mm. Skeleton vs solid dial: Skeleton builds (NH72 movement) show the movement through the dial and caseback — they are visually striking but harder to read at a glance. Solid dial builds (NH35 movement) with waffle or textured dials offer cleaner legibility and a more traditional look. Movement: The NH35 is the reliable workhorse — automatic with hacking and hand-winding, 41-hour power reserve. The NH72 is the skeleton variant with the same internals but an open-worked design. Both are Seiko Instruments movements. Read our NH72 movement guide if you are considering a skeleton build. Case finish: Sil