Seiko Mod Parts

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Every Seiko mod part from Nomods in one collection. Browse cases in four platforms from 37 mm to 41 mm, skeleton and solid dials in 28.5 mm and 30.8 mm, hand sets in polished and brushed finishes, seven NH automatic movements, straps and bracelets, and accessories like crowns, screwdrivers, and spacer rings. All parts are designed to work together — every case fits every movement, and every hand set fits every movement. The only compatibility variable is dial size: 28.5 mm or 30.8 mm, depending on your case. Prices start at $5 for accessories and go up to $195 for premium cases. Dial size is the most important spec: Seikonaut / Nautilus Ultra-Thin (40 mm) and Royal Oak 41 mm cases take 30.8 mm dials. Petrichor (37 mm) and Royal Oak 37 mm V2 cases take 28.5 mm dials. A wrong-size dial will not physically fit. Read the dial size guide before ordering. Movement compatibility: All Nomods cases accept every NH-series movement — NH35, NH36, NH38, NH34 GMT, NH70, NH71, and NH72. No adapter or spacer ring needed. Pair skeleton movements (NH70/NH71/NH72) with skeleton dials and standard movements (NH35/NH36/NH38) with solid or waffle dials. Watch out: Skeleton dials require a skeleton movement. Pairing a skeleton dial with an NH35 shows the solid rotor plate through the cutout, which looks unfinished. Always match dial type to movement type. How to Choose Your Parts Building a Seiko mod watch requires four core components: a case, a movement, a dial, and a set of hands. Here is how to select each one. Start with the case: The case determines everything else. It sets the dial size (28.5 mm or 30.8 mm), the watch diameter (37–41 mm), and the overall aesthetic. Nomods offers four case platforms: the Seikonaut / Nautilus Ultra-Thin at 40 mm with a horizontally ribbed bezel, the Petrichor at 37 mm with a domed sapphire, the Royal Oak 41 mm with an octagonal bezel and 100 m water resistance, and the Royal Oak 37 mm V2 for a compact build. Cases range from $110 to $195. Pick your m

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