A Seiko mod is a custom-built watch that starts with a trusted Seiko automatic movement and is upgraded with premium aftermarket parts, often crafted from durable 316L stainless steel. Each piece is hand-assembled to create a unique timepiece that blends Seiko’s legendary reliability with personalized design.

The purpose of Seiko modding is to make the style and feel of luxury watches more accessible—without counterfeits—by using only the best materials, including sapphire crystals, ceramic bezels, and solid steel cases. Whether you want a diver, GMT, or dress watch, a Seiko mod lets you design your dream watch with quality and individuality at its core.

Each Seiko mod watch includes a user-friendly adjustment kit, allowing you to perfectly size your bracelet at home—no jeweller visit required. This ensures your Seiko mod fits comfortably and looks flawless from the moment you wear it.

You can select from our curated collection of Seiko mod designs or contact us via Instagram or email to craft a fully personalized custom Seiko mod watch. Whether you prefer a sleek, minimalist style or a bold homage, our expert team will bring your vision to life, delivering a timepiece that perfectly reflects your taste and individuality

We use genuine Seiko movements, renowned worldwide for their precision, durability, and reliability. Every custom Seiko mod watch is meticulously hand-assembled to ensure exceptional quality and a truly unique design. Please note: while our watches feature authentic Seiko movements, we are not affiliated with Seiko or any other watch brands, and these timepieces are not replicas—they are entirely original, custom-built creations.

Yes, you can fully customize your Seiko mod watch—including the option to remove the Seiko logo or inscription for a completely clean look. Simply share your preferences before placing your order, and we’ll tailor your custom Seiko mod to match your exact vision and style.

All watches are hand made to your order, please allow up to 4-7 days for your watch to be built, tested, and prepared for shipping.
We always aim to deliver faster than this time frame but it ensures we can take the necessary measures to allow us to perfect every detail of your watch with precision and care. Once completed, we ship your timepiece via express delivery—worldwide.

At kouluolang, we stand behind the quality of our craftsmanship. Every custom Seiko mod watch includes a 1-year guarantee against manufacturing defects, ensuring your unique timepiece is backed with confidence and reliability

We have adopted a two-way customs clearance transportation service provider, and you do not need to pay any customs duties when you receive the package.