Seiko Mods — Frequently Asked Questions
Are Seiko mods real Seiko watches?+
Yes. Our prebuilt Seiko mods use authentic Seiko/NH movements (e.g., NH35/NH36, NH70/71/72).
Cases, dials, hands, crystals, and some accessories are high-quality aftermarket parts, professionally assembled by NOMODS.
Can Seiko mods be serviced like normal watches?+
Yes. Any competent watchmaker familiar with Seiko NH movements can service them (regulation, lubrication, parts replacement).
Keep your order info so a technician can reference the exact movement and parts.
Which movement is best for a Seiko mod?+
NH35/NH36 are the most popular and reliable for daily wear.
NH70/71/72 are used for skeleton builds, while NH34 adds a GMT hand and NH38 is a clean no-date option.
What case size should I choose — 37 mm or 39–41 mm?+
37 mm suits slimmer wrists and classic proportions;
39–41 mm gives a bolder, modern presence.
Case size also influences dial diameter (28.5 mm for most 37 mm builds, ~30.8 mm for many 39–41 mm styles).
Are Seiko mods water-resistant?+
Many builds are designed to be water-resistant, but it’s only guaranteed if a watch is pressure-tested and rated after assembly.
If water resistance matters, choose a rated model and avoid opening the case after purchase.
How much do prebuilt Seiko mods cost?+
Pricing varies by movement, case style, crystal, and finishing.
Expect entry builds in the lower hundreds and premium skeleton or luxury-style builds running higher.
Each product page lists exact specs and price.
Can I request changes to a prebuilt watch?+
Minor changes (strap, bracelet, or crystal profile) may be possible before shipping.
More complex swaps depend on compatibility. Contact us with the product link and the change you’d like.
