Open Heart Mod Watches

How it works

  • Choose your watch

    Pick the design and the case size that suits your wrist.

  • Made to order

    Built for you on a genuine Japanese automatic, assembled and inspected before dispatch.

  • Delivered with care

    Free worldwide shipping, backed by a 1-year warranty.

    Reviews from real customers

    • ★★★★★

      “Fantastic watch quality and great design.”

      Connor Beadle · ✓ Verified on Trustpilot

    • ★★★★★

      “The watch was fantastic, great support from the team.”

      Rodney · ✓ Verified on Trustpilot

    • ★★★★★

      “Watches are killa, way better than I expected.”

      Logan Adams · ✓ Verified on Trustpilot

      An open heart dial cuts an aperture into the face so you can watch the balance wheel beat. It is the clearest reminder that nothing inside is running on a battery.

      These run the genuine Seiko NH38, the open heart variant of the NH35 family, under sapphire crystal in a 316L stainless steel case on an integrated bracelet. Made to order and sized to your wrist, roughly 2 to 3 weeks, with a 1 year warranty.

      Read how the integrated bracelet styles differ, or see the full Nautilus range.