Seikomariner︱Black

Name: Seikomariner︱Black
Brand: Modsera
SKU: bml2
Price: 299.00 USD
Availability: InStock

$299.00

$339.00

$40 OFF

$309.00

BUY 2 WATCHES, GET 1 FREE

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10 ATM Waterproof

Swimproof, built to handle daily wear

Free Gift

Leather watch box & toolkit

3 Years Warranty

For worry-free wear

100-Day returns

Easy & Hassle Free

Description

Inspired by the iconic Submariner design, the Seiko Mod Submariner features the renowned Seiko NH35 automatic movement. This 40 mm timepiece offers high-end quality and precision, blending excellence with accessibility in a sleek, modern watch.

Case Size: 40 mm
Case Thickness: 13 mm
Glass: Scratch-resistant sapphire
Wrist Size: Fits all (adjustable)
Case Material: Stainless steel
Strap Material: Stainless steel
Bezel Material: Ceramic
Water Resistance: 10 ATM (resistant to splashes, rain and swimming)
Backside: Transparent case back showcasing the intricate movement

Movement Specifications:

Manufacturer: Seiko mechanism
Model: NH35 Automatic
Power Reserve: 41+ hours

OUR 3 year Warranty

We offer a 3 year guarantee!

We stand by our quality, if your watch color fades, we’ll replace it with a brand new one, for free.
If your watch has any defects, please contact us for repair or replacement. Keep your purchase receipt for warranty claims.

SHIPPING INFO

Shipping time 6-10 business days

EASY Returns: Return items within 100 days for a full refund. Items must be in their original condition.

100 DAY EASY RETURNS

Return items within 100 days for a full refund. Items must be in their original condition.

Seikomariner︱Black

$299.00

$339.00

$40 OFF

$309.00

LISTEN TO OUR CUSTOMERS

Ended up with the 3 for 2 deal, couldn't be more happy with my order! Kept me updated throughout the process, from order confirmation to delivery.

Thomas. S
Sep 24, 2025

Amazing watch, great customer service and the shipping was fast. Definitely going to order more.

Joe. L
Aug 3, 2025

The quality is amazing! Also, the watch came with a free bracelet. Arrived very quickly and customer service was excellent.

Frederic. P
Aug 28, 2024

Incredibly well made. The bracelet feels great on the wrist, and the transparent case back are nice touches. The movements feel solid. keeps accurate time.

Jade. G
June 31, 2025

I can feel that it's high quality! It's beautifully crafted, completely exceeded my expectations. 10/10 customer service.

James. B
March 4, 2024

I can feel that its high quality! It's beautifully crafted, completely exceeded my expectations!

Jonathan. R
January 22, 2025

Great watches and service throughout.Very happy with the watch and service, will definetely be buying a few more watches.

Craig. M
Aug 28, 2025

Took advantage of the 3 for 2 deal and I absolutely love the watches. They hold great time, super easy to adjust the links, and the customer service is fast!

Zachary. G
July 5, 2025

Modsera kept me updated throughout the entire process, from order confirmation to delivery. The watch is stunning.

Thomas. S
April 18, 2024

Insane quality! The watch feels high-quality and looks very expensive. Delivery was fast, and everything went smoothly.

Samuel. O
March 25, 2025

This watch is a showstopper. Absolutely love it. First time I’ve ever had people stop me and ask me about a watch. Shines like the real thing, but with extra features.

John. K
May 9, 2024

VIEW ALL

Luxury Gift

For a better experience

Each watch comes in a fancy leather watch box. And that's not all, every purchase includes a free dust bag and toolkit with a guide to help you adjust your watch strap for a perfect fit.

SEIKO MOVEMENT

Automatic, self-winding, 41+ hour power reserve, and trusted in the watch industry for its accuracy.

WATER RESISTANT

Planning to swim? No problem, our watches are 10ATM water-resistant and built for everyday wear.

904L STAINLESS STEEL

Crafted from 904L stainless steel, the same grade used by luxury watch brands. The best thing is the color wont fade!

SAPPHIRE CRYSTAL

Fitted with sapphire crystal, ultra-clear, scratch-resistant. Your watch stays sharp, no matter what.

Need help?

Frequently Asked Questions

What is a Seiko Mod?

A Seiko Mod is a unique, custom-built watch hand-assembled using a prestigious Seiko automatic or hybrid movement, combined with high-quality aftermarket parts, crafted from 904L stainless steel.

Have you ever dreamed of owning your ideal timepiece?

The purpose of Seiko mods is to make the designs of luxury watches accessible to a wider audience, without resorting to counterfeit products. Each build uses only the best materials, such as sapphire crystal and ceramic bezels, to ensure quality and authenticity.

Shipping Time?

Overall, the entire process from start to finish spans 5-9 working days (Monday-Friday), ensuring each watch meets our high standards before it reaches you.

About the cost, shipping is totally free.

How can I adjust the strap size?

We include (for free) a complimentary tool kit to help you adjust the strap properly. Click here for instructions.

Please refer to the guide you get on email and follow the instructions carefully to adjust your strap size.

Is it possible to remove the Seiko logo?

Absolutely. We provide the flexibility to customize your watch according to your preferences, including the option to remove the Seiko logo.

Please include your specific requirements in a message when placing your order.

3 years warranty

Yes, all our watches come with a 3-years warranty covering any manufacturing defects, to ensure a zero stress experience. If you experience any functionality issues or other problems, please contact us HERE

Are they original?

We use genuine Seiko movements to create unique watches inspired Top Designers.

Our timepieces are not replicas and we are not affiliated the Seiko brand in any way.

Need more help? Our support team is here to assist you.

NEED HELP

SUMMER