A Seiko Oyster Perpetual Datejust watch with a stainless steel link bracelet and a deep blue speckled dial, shown against a plain white background.
A Seiko Oyster Perpetual Datejust watch with a silver stainless steel case and link bracelet, featuring a dark blue speckled dial and a date window.
A close-up shot of a Seiko Oyster Perpetual Datejust watch with a silver stainless steel bracelet and a dark blue speckled dial, set against a solid black background.
A Seiko stainless steel wristwatch with a blue speckled dial and a matching steel Oyster bracelet, photographed against a solid black background.
A wrist wearing a Seiko stainless steel watch with a blue speckled dial and a date window showing '27'.
4.8(31)Our most loved watch

Oyster Galaxy

36 mm or 39 mmSeiko NH35 automaticSapphire crystal
€259,99€279,99Save €20
Case Size: 39mm
Upgrade your watchOptional

  • Free worldwide shipping
  • 30 days to return
  • 1-year warranty
  • Secure payment
About this watch

Inspired by the iconic Oyster design and powered by the prestigious Seiko NH35 automatic movement, the Seiko Mod Oyster is available in 36 mm or 39 mm, offering a perfect union of refined craftsmanship, timeless style, and everyday practicality.

Specifications
Diameter
36 mm or 39 mm (excluding crown)
Movement
Seiko NH35 automatic
Thickness
12 mm
Crystal
Sapphire, scratch-resistant with anti-reflective coating
Luminova
Yes
Case
904L stainless steel
Crown
Screw-down
Wrist fit
Adjustable from 14.5 cm to 22 cm
Lugs
20mm
Bracelet
904L stainless steel with security clasp
Case back
Crystal (seen movement) / Steel (closed back)
Water resistance
3 ATM
In the box

Your watch arrives in a minimal black watch case, protected by film and packed to reach you in perfect condition. Inside you'll also find a bracelet adjustment tool, so you can size it to your wrist at home in a couple of minutes.

Shipping and returns

Your order is assembled with care, a process that typically takes time depending on material availability.
We offer two shipping options:
- Express Shipping 3-7 working days, for a fee.
- Standard Free Shipping 12-15 days.


This is a transparent and honest estimation based on the majority of our orders.

You have 30 days to return or exchange your watch.

Warranty

Every watch has a 1-year warranty covering movement failure and any material or assembly defect. Outside warranty, write to info@modhousewatches.com and we'll still help.

What's inside

Seiko automatic movement
NH35
Case diameter
36 / 39mm
Scratch-resistant crystal
Sapphire
Stainless steel case
904L

Part by part

Tap a number on the watch to see what each part is made of.

Made to be worn

Wind it once, then let your wrist do the rest. An automatic movement keeps running as long as you wear it.

Questions before you buy

Can't find your answer? Write to us and the team will reply.

What is a Seiko mod?

A watch built around a genuine Seiko movement, with aftermarket parts for the case, dial, hands and bracelet. We choose every combination, so you get a look you won't find on the shelf.

Are you affiliated with Seiko or any luxury brand?

No. ModHouse isn't affiliated with Seiko or any other watch brand. We use genuine Seiko movements because they're reliable and any watchmaker can service them.

Does it need a battery?

Not on automatic models (NH34, NH35, NH36, NH38, NH70, NH72). They wind themselves as you wear them and keep running for about 41 hours off the wrist. If yours stops, wind the crown 20 to 30 turns or simply wear it.

Some chronograph models use Seiko VK mecha-quartz movements, which run on a battery. The movement is listed on every product page.

Which size is right for me?

Most models are 39 to 40 mm. Some are also offered in 36 mm, which suits slimmer wrists or a vintage look. The case size is in the specifications of each watch.

Will the bracelet fit my wrist?

Bracelets adjust from about 14.5 to 22 cm. Every box includes a link removal tool, so you can size it at home in a couple of minutes. Any jeweller can do it too.

Can I swim with it?

Most models are rated 3 ATM: fine for rain and washing your hands, not for swimming or showering. The water resistance of each model is in its specifications.

How long does shipping take?

Shipping is free worldwide with tracking. Your watch is prepared in 2 to 5 days and usually arrives 15 to 25 days after you order. Express shipping (2 to 6 days) is available at checkout.

How do I pay?

All major cards, PayPal, Apple Pay, Google Pay and Shop Pay. Checkout shows every option available in your country, including paying in instalments where offered.

Can I return or exchange it?

Yes. You have 30 days from delivery. Start from the return form or read the refund policy.

What does the warranty cover?

Every watch has a 1-year warranty covering movement failure and any material or assembly defect. Outside warranty, write to info@modhousewatches.com and we'll still help.

How can I track my order?

You get a tracking link by email as soon as your watch ships. Can't find it? Check your spam folder or contact us with your order number.

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