🎁 Code GIFT80 — $80 off your order today

Custom Seiko Mod Seamaster SMP300 Classic Homage

Regular Price
$389.99
Sale Price
$389.99
Regular Price
$1,949.95
Sold Out
Unit Price
per 
🎁 Free Luxury Gift Set Included (Worth €59)
Premium Watch Box + Exclusive Owner’s Guide

✅ Original Seiko Movement

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CLEARANCE SALE: Limited stock available. Items that show "Add to Cart" are still in stock.

We present a refined Seamaster-style SMP300 homage, created to reflect the enduring design principles of classic professional dive watches.

Inspired by 1990s dive-watch aesthetics, this timepiece focuses on balance, legibility, and functional engineering. The design is clean and purposeful, avoiding unnecessary elements while emphasizing usability and long-term wear. It is made for individuals who value precision, durability, and thoughtful construction over passing trends.

⚙ Premium automatic mechanical mod movement
Selected for reliable performance, smooth operation, and everyday dependability.

💎 Domed crystal with refined case finishing
Provides clear visibility while complementing the watch’s classic proportions.

🖤 Classic monochrome dial
A clean, high-contrast layout designed for legibility in both daily and low-light conditions.

⛓ Custom bracelet or diver-style strap option
Built for comfort, durability, and consistent wear throughout the day.

💡 Bright lume and functional rotating bezel
Designed for practical use, offering clarity and usability when it matters.

This is not a mass-produced smartwatch or a generic factory model. Each watch is assembled with attention to detail, using selected components to ensure consistency, reliability, and a cohesive overall build.

Produced in limited quantities, this model is assembled in small batches.

Availability is subject to stock.

A Seamaster-style SMP300 homage for those who appreciate classic tool-watch design, mechanical craftsmanship, and understated functionality.

CLEARANCE SALE...

Hi, I’m Kevin, founder of ZJani Mods.

After 12+ years of building Seiko-inspired watches, we’ve made the decision to significantly reduce our collection.

This is the final release of many of our most popular designs.

Once these watches sell out, they are permanently gone.

No restocks. No remakes.

We’re clearing the remaining inventory at reduced pricing — but stock is already limited and moving fast.

Some models are already close to selling out.

If you’ve been waiting, this is your last chance to get one before they disappear.

When they’re gone, they’re gone.

Thank you for being part of our journey❤️

Uitstekend!

Gebaseerd op 827+ reviews

EXCELLENT

Rating 4.8 / 5 based on 12,868 reviews. View our 4 & 5 star reviews.

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    6 days ago

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    Amazing looking piece!

    I’ve just ordered 2, one for me and one for a friend. I’ve emailed Daniel at support with a couple of questions, he’s replied very quickly with the answers. Great service. 

    Andrew S

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    3 days ago

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    Perfect blend of precision and value!

    It arrived on time and feels and looks the part, is the right size for me, keeps very accurate time and it’s amazing value for money compared to some of the watches in my collection.

    Tom k

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    6 days ago

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    Exceeded expectations.

    Great communication by Ellie via email regarding the shipment. Once dispatched their tracking facility was great and I could follow my watch as it made it to my door.

    Richard D

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    7 days ago

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    Definitely a quality piece!

    Just received mine it is definitely a quality piece. The design and quality are amazing!

    Mike B

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    2 days ago

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    A heartfelt tribute to a classic watch - understated excellence

    A lovely homage to a favorite watch. Really well done without being over the top.

    Andrew S

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    5 days ago

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    Great vintage watch

    Amazing vintage watch! Highly recommend for anyone looking for a top-tier watch without the hefty price tag.

    Pete C

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    3 days ago

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    Happy with my new watch

    I just bought a watch from zjani and I love it! The watch looks amazing and is made really well. This watch is just what I wanted and I'm very pleased with it.

    James R

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    8 days ago

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    Worth every penny

    An unparalleled blend of exquisite craftsmanship and unique customization. Thank you zjani.

    David L