Seikojust | Royal Green Roman

4.7 | +100 Customers

Seikojust | Royal Green Roman

€265,00 EUR

Hand-assembled

Automatic movement

Premium materials

Free worldwide shipping

Logo: No Logo Seiko Logo

Size (mm): 39 36

Case Back: Crystal (Seen Movement) Steel (Closed Back)

Hand-assembled · Ships worldwide · 12-month warranty

Sarah M.

New York

Absolutely stunning craftsmanship. The attention to detail is remarkable.

James L.

London

Exceeded all expectations. A true masterpiece of design and engineering.

Emma R.

Paris

The perfect blend of elegance and precision. Worth every penny.

Description

The Seiko Mod Datejust takes inspiration from the legendary Datejust design and is powered by the reliable Seiko NH35 automatic movement. Available in 36mm or 39mm, it’s built to combine everyday comfort with a luxury feel.

Case size: 36mm / 39mm
Movement: Seiko NH35 automatic
Thickness: 12mm
Crystal: Sapphire, scratch-resistant with anti-reflective coating
Lume: Long-lasting glow in the dark
Case & bracelet: Solid 316L stainless steel with security clasp
Case back: Choose crystal (see the movement) or closed steel
Wrist fit: 14.5cm - 22cm, adjustable
Water resistance: 3 ATM

A watch that blends classic style, premium materials, and everyday reliability - made for those who want luxury without compromise.

Processing & Shipping

Each watch is hand-assembled after your order is placed. Please allow 7–15 business days for processing before shipment. In some cases, orders may be completed sooner depending on part availability.

Shipping time
Once dispatched, delivery typically takes:

Europe & International: 3–7 business days

All orders are shipped with tracking. You’ll receive a confirmation email as soon as your watch leaves our studio.

Why it takes time

Our watches are not mass-produced. Each piece is carefully assembled in Sweden using reliable Seiko movements and custom-selected parts, followed by a final quality inspection before shipping.

Shipping costs & duties

Free world wide shipping on orders over 150 EUR. Import duties or taxes may apply depending on your country and are the customer’s responsibility.

What is an Automatic Watch?

An automatic watch is a mechanical timepiece that powers itself through the natural movement of your wrist. As you wear the watch, an internal rotor winds the movement, storing energy to keep it running.

Unlike quartz watches, automatic watches do not require a battery. Instead, they rely on traditional watchmaking mechanics refined over decades for reliability and precision. As long as the watch is worn regularly, it continues to run, and once fully wound, it can keep time for up to 41 hours even after being taken off the wrist.

NEED HELP?

FREQUENTLY ASKED QUESTIONS

What is a Seiko Mod?

A Seiko Mod is a custom-built watch, hand-assembled using a trusted Seiko automatic or hybrid movement. It’s combined with high-quality aftermarket parts, to create a unique timepiece just for you!

Do they have any type of warranty?

Yes. All watches come with a 1-year warranty covering movement-related issues.

I like a watch, but want another strap/dial.

No problem. Message us before ordering—we can customize it for you.

How long does assembly take?

Assembly takes around 10–15 business days. That’s because each watch is made to order from scratch. We source your chosen parts, hand-assemble everything with care, and do a full quality check before shipping. This way, you get a custom timepiece that’s built to last.

Do you ship internationally?

Yes, we ship worldwide. Standard shipping rates apply and are calculated at checkout.

Is the quality of the watches good?

Pay and Find Out ;)