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DIY watch kit: Seiko mod parts, tools and contents

A DIY watch kit for a Seiko mod starts with a list of its parts, tools and contents. The movement, dial, hands and case need to fit together; this overview helps you prepare for assembly.

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2-Year Warranty

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Which components belong in a Seiko mod kit?

For a complete wristwatch project, check the movement, dial, hands, case with crystal and seals, case back, crown and stem, and strap or bracelet. Check whether the case needs a movement holder or other fitting components. Some parts may already be fitted; use the supplier's actual contents list rather than assuming that "complete kit" includes every item.

Match components to the chosen calibre and case. For example, the NH35A has a date display and the NH36A has day and date. That difference affects your dial choice, but the calibre alone does not establish compatibility for the whole build. Our NH35 guide explains the movement; the parts guides help you compare individual components.

Tools and assembly: what to plan before you buy

Check the kit instructions for hand-setting tools, a movement holder, tweezers and the right tool for its case back. Plan a clean working area and check which tools are included, which you need separately and which parts arrive preassembled.

Typical work involves fitting the dial and hands to the movement, casing the assembly, fitting the crown and stem, closing the case and attaching the band. The exact order and method depend on the components: follow the supplier's instructions. Setting the hands and handling the dial require careful work. A parts list or an assembly checklist does not establish water resistance; that needs an appropriate check of the finished watch.

DIY kit or an assembled custom watch?

Choose DIY if working with the components and learning assembly are part of what you want. Allow time for preparation, suitable tools and compatibility checks. A repair-tool set or replacement part is a different purchase from a watchmaking kit: neither supplies a complete watch build on its own.

Choose an assembled watch if your priority is the design you will wear. Select a model and its available options, and MedoMods assembles the watch. Compare the kit's parts, tools and delivery costs with the total price of the assembled watch. DIY is not always cheaper, because the components and services included can differ.

The MedoMods alternative: configure an assembled watch

Open the configurator selection, choose a model and review its available components. The selection includes automatic and quartz watches. Check the movement, materials and case back listed for your chosen configuration.

The cards show starting prices; the external configurator shows the full configuration price. You configure and order there, and MedoMods assembles the watch. Our configurator guide explains the selection step by step.

Before buying a DIY kit elsewhere, check the supplier's contents, tools and assembly instructions.

Ordering and delivery

Standard delivery worldwide takes an estimated 10–12 calendar days from order. You receive your tracking number by email after dispatch.

Every watch comes with a 2-year warranty from delivery. It covers manufacturing defects and functional problems under normal use. It doesn't cover scratches, damage from opening the watch, or water damage. Warranty information

Customs duties and import charges are included in the price, also for delivery outside the EU, for example to Switzerland, Norway, the UK or the USA.

Keep reading & matching models

Frequently asked questions

Which components belong in a Seiko mod kit?

Check for a compatible movement, dial, hands, case, crystal, seals, case back, crown, stem and band, plus any fittings the case requires. Read the actual contents list: tools and preassembled parts differ between suppliers.

Which tools and skills do I need for DIY assembly?

The exact tools depend on the kit. Check its instructions for hand setters, a movement holder, tweezers and a case back tool. Allow time for careful dial and hand handling, and confirm compatibility before starting. Assembly alone does not prove water resistance.

When should I choose an assembled watch?

Choose it if you want to select the design and receive a finished watch. In the MedoMods configurator you choose the options offered for a base, review the full price and order an assembled watch. It is not an order for a loose-parts DIY kit.

Ready? Build your Seiko mod or browse the collections.

Configure an assembled watch
2-Year Warranty