Select Right Movement for Your Seiko Mod Watch

Choosing the appropriate movement is a crucial decision when modding a Seiko watch. The movement not only dictates the watch's timekeeping accuracy but also plays a significant role in its overall performance and compatibility with your modding vision. Here's a step-by-step guide to help you navigate the process of selecting the right movement for your modded Seiko watch:

1. Define Your Goals:

Begin by clarifying your modding goals. Are you seeking improved accuracy, enhanced functionality, or a specific aesthetic? Understanding your objectives will guide your movement selection.

2. Research Movement Options:

Research available movement options that align with your goals. Seiko movements are known for their reliability and diversity. Popular choices include the NH35, NH36, NH70, and more. You should research the specifications, features, and compatibility of each movement.

3. Consider Movement Fit:

Ensure that the movement you choose fits within the case of your modded watch. Check the dimensions of both the movement and the case to guarantee a proper fit without crowding or gaps.

4. Movement Hacking and Hand-Winding:

Decide if you want a movement with hacking (the ability to stop the seconds hand when setting the time) and hand-winding capabilities. These features can add convenience and precision to your modded watch.

5. Lume and Date Functionality:

Consider whether you want a movement with lumed hands and indices for enhanced low-light visibility. Additionally, think about whether you want a date complication and its placement on the dial.

7. Quality and Origin:

Evaluate the reputation and quality of the movement manufacturer. High-quality movements are more likely to provide accurate timekeeping and long-term durability.

8. Movement Holder Compatibility:

Ensure that the movement holder you plan to use fits the chosen movement. A properly fitting holder contributes to a stable and secure installation.

9. Assembly Skill Level:

Consider your own skill level in watch assembly and modding. Some movements may require more intricate assembly processes, so choose one that matches your expertise.

10. Budget:

Set a budget for your modding project, including the cost of the movement. Quality movements can vary in price, so find a balance between your desired features and your budget.

11. Consult with Experts:

If you're unsure about movement compatibility or performance, consult experienced watch modders or professionals. They can offer insights and recommendations based on their expertise.


Selecting the right movement requires careful consideration of your modding goals, technical specifications, and compatibility. Each movement has its own character and capabilities, so take your time to research and choose the one that aligns with your vision for the ultimate modded Seiko watch.

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