Seiko Mod Engine

How to Use the Seiko Mod Compatibility Engine

Select your base Seiko watch or movement from the dropdown above. The engine instantly shows whether popular mod parts like bezels, crystals, hands, crowns, and movements will fit directly, require modification, or are incompatible. This removes guesswork before you buy parts.

• Direct Fit: Part installs without modification.
• Modify: Part works but requires cutting stems, dial feet, or alignment changes.
• No Fit: Part is incompatible with this case or movement.

Seiko Modding Compatibility Guide (SEO)

This Seiko mod parts compatibility tool supports SKX007, SKX009, Seiko 5 SRPD (5KX), SNK809, Turtle, Samurai, Sumo, Urchin, and the NH35/NH36 movement. Use it to verify bezel insert sizes, sapphire crystal diameters, hand fitting, stem cutting requirements, crown compatibility, and movement swaps before ordering parts.

Popular searches covered include: NH35 stem length, SKX007 bezel insert size, SRPD crystal compatibility, Seiko mod hands fitting, and NH36 dial feet alignment. This tool is designed for Seiko modders building custom divers, field watches, and NH35-based builds.