Assembly: Takes 1 - 3 working days to put together your watch. Quality Testing: After assembly, we spend another 1-3 days on testing and quality checks to ensure optimal performance. Shipping: Your watch is then shipped, which typically requires 4-6 working days. Overall, the entire process from start to finish spans 10-14 working days (Monday-Friday), ensuring each watch meets our high standards before it reaches you. About the cost, shipping is totally free.

Seikojust Twotone White

Q: 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.

Q: 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.

Q: 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 .

$359.00

$399.00

$429.00

Size:

36mm 39mm

Variant

BUY 2 WATCHES, GET 1 FREE

Add 3 watches to your cart, one watch becomes free. No code needed. Ends in ...

5 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

Drawing inspiration from the iconic Datejust design and powered by the renowned Seiko NH35 automatic movement, the Seiko Mod Datejust combines high-end craftsmanship with accessible luxury in a timeless 36/39 mm package.

Case Size: 36 or 39mm
Case Thickness: 13 mm
Glass: Sapphire
Wrist Size: Universal (adjustable)
Case Material: Stainless steel
Strap Material: Stainless steel
Movement: NH35 Seiko Movement with date
Water Resistance: 10 ATM Suitable for normal daily wear and swimming.
Backside: Transparent case back

Movement:

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

OUR 3 year Warranty

We offer a 3 year guarantee!

If your watch has any defects, please contact us for repair or replacement. Keep your purchase receipt for warranty claims.

SHIPPING

Total delivery time is 7–12 days. Each watch is built by hand and goes through 1-3 days of assembly and testing before shipping. This includes a full quality check and water pressure test to ensure top performance.

RETURNS

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

Seikojust Twotone White

$359.00

$399.00

$429.00

Fell for 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
January 12, 2024

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

Joe. L
February 3, 2025

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

Frederic. P
August 6, 2024

Can't get enough of this Olive dial. I can wear it all day without any discomfort. Very good support!

Paul. D
November 28, 2024

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

Blown away by how fast modsera answer. The craftsmanship is incredible, and I love the attention to detail.

George. K
February 14, 2025

The color scheme of this Daytona watch is fantastic! I chose a classic model, perfect for everyday wear.

Remy. G
December 15, 2024

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

Watch is amazing, the quality is impressive. They are super helpful, and they even followed up to make sure I was happy.

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. Built to shine for a lifetime.

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?

Assembly: Takes 1-3 working days to put together your watch.
Quality Testing: After assembly, we spend another 1-3 days on testing and quality checks to ensure optimal performance.
Shipping: Your watch is then shipped, which typically requires 4-6 working days.

Overall, the entire process from start to finish spans 10-14 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.