Seiko NH Series

If you’ve been around the modding community for even a day, you’ve heard of the Seiko NH series. The NH35, NH36, and NH38 are the beating hearts behind thousands of custom builds — reliable, easy to service, and surprisingly affordable. What people love most about these movements is their consistency. Whether you’re upgrading a Seiko 5 or building your dream diver from scratch, the NH series handles it like a champ. And the best part? They fit perfectly with tons of aftermarket watch cases and custom dials. Pair it with clean watch hands or a bold date wheel, and you’ll instantly see your build come alive.

Many DIYers start with NH35 because it’s practically indestructible and supported by a huge modding ecosystem. You can easily mix it with balance wheels, custom crowns, and other movement parts. The winding feels smooth, the power reserve holds strong, and timing adjustments are simple. Check out our guide NH35 vs NH36 — Which Should You Choose? before you order. Whether you’re restoring a vintage case or building your own microbrand, Seiko NH series movements bring pro-level reliability at hobbyist prices.