Watch Modding Guide

This two-part guide provides a complete walkthrough for building and customizing Seiko-based watches — from beginner mods to advanced, pro-level builds. 

The Beginner’s Guide walks you step-by-step through essential tools, part swaps, disassembly, and reassembly techniques to build a reliable and clean Seiko mod. 

The Advanced Watch Modding Guide is designed for experienced modders who want to go beyond plug-and-play builds and dive into high-precision, custom-level watchmaking. Covering essential tools, mod types, project planning, part compatibility, movement swaps, lume work, crystal and bezel upgrades, and pressure testing, it offers a professional-level approach to building sterile tool watches, custom divers, vintage homages, and more. Includes step-by-step process, tool lists, example builds, and a “Mod Project Blueprint” template to help plan and execute complex watch mods with control and confidence.