Customize your own Seiko mod

Design a watch that’s 100 % you. Select the case style, bezel color, dial, hands, and bracelet; our watchmaker assembles every build by hand in Budapest using genuine Seiko NH35A movements and premium aftermarket parts. Each piece is pressure-tested for everyday wear and ships world-wide in protective packaging. Have questions or a special request? Chat with us before ordering and we’ll guide you through the options.

- Base movement: Seiko NH35A automatic, hacking & hand-winding
- Accuracy: −20 / +40 s per day (factory spec)
- Power reserve: ~41 hours
- Case diameter: 40 mm (profile varies by case style)
- Lug width: 20 mm
- Crystal: Sapphire, inner AR coating
- Water-resistance: 10 ATM / 100 m (after assembly & pressure test)
- Bracelet options: Oyster, Jubilee, Presidential (solid links, screw pins)
- Lume: Swiss Super-LumiNova on dial & hands

The NH35A is Seiko’s work-horse automatic calibre—reliable, low-maintenance, and easy to service anywhere in the world. We regulate every movement in-house before casing, aiming for ±10 s/day in normal wear. Each finished mod is backed by our 1-year warranty covering the movement and assembly workmanship.

- Fully customisable: 50+ combinations of bezels, dials, and handsets
- Premium materials: Surgical-grade stainless steel, scratch-resistant sapphire
- Pressure-tested: Ready for swimming / daily use out of the box
- Easy upgrades: Swap bezels or bracelets later without special tools
- Personal support: Talk directly with a builder — not a chatbot — before and after purchase