Seiko Mod Datejust Roman Numerals Blue
Seiko Mod Datejust Roman Numerals Blue
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Seiko Mod Datejust – Elegance and Performance
The Seiko Mod Datejust is a refined timepiece that blends timeless style with reliable engineering. Available in 40mm, its 316L stainless steel case ensures both durability and comfort.
Powered by the trusted Seiko NH35 automatic movement with a 41-hour power reserve, it features a fluted polished bezel, sapphire crystal, and transparent case back to admire the mechanism. Water-resistant to 10 ATM and equipped with a screw-down crown, it's built for everyday elegance.
Covered by a 12-month warranty, the Datejust is perfect for those who value sophistication and lasting performance.
Features
- Diameter : 40 mm
- Thickness : 12 mm
- Water resistance : 10 ATM
- Movement : Seiko NH35 automatic
- Power reserve : 41 hours
- Bezel : Fluted polished steel
- Case back : Transparent
- Glass : Sapphire

FAQ
What is a Seiko Mod?
A Seiko Mod is a customized watch built around a genuine Seiko automatic movement, fitted with custom parts like the dial, bezel, hands, and more.
At Maison Arclay, each model is hand-assembled in France, offering unique designs you won’t find in the official Seiko catalog—while maintaining the reliability and precision of the NH35 movement.
What are the delivery times?
Our watches are made in France, then shipped from our warehouse in Ottawa to ensure fast delivery.
Expect an average of 4 to 6 business days for delivery once shipped via Canada Post.
Can I return my order ?
Yes, you have 14 days after receiving your watch to return it if it doesn’t suit you.
The item must be unworn, in perfect condition, and in its original packaging. Please contact us through our form or by email to request a return label.
Is the watch water-resistant?
Yes, our watches are highly water-resistant, with a rating of up to 10 ATM (100 meters).
They can be worn in the rain, in the shower, or even while swimming.
Is the watch under warranty?
Yes, all our watches come with a 2-year warranty covering the automatic movement and any manufacturing defects. If you experience any issues, our customer service team is here to provide a quick and effective solution.