FREE UK SHIPPING ON ALL ORDERS  ·  HANDBUILT TO ORDER  ·  1 YEAR WARRANTY
Handcrafted Seiko Modifications

Worn
by the
Few.

Every MHI Customs piece is hand-assembled in the UK with premium components and quality movements — craftsmanship built to last a lifetime.

Configure Yours Our Story
SEIKO MOD SPECIALIST
UK
Based & Handbuilt
Quality
Movements Used
100%
Custom Made
1 Yr
Full Warranty
Shop
Watches
Watches Coming Soon
We’re currently working on our next builds. Every MHI Customs watch is handbuilt to order — quality movements, finished to perfection. Sign up to be the first to know when new watches drop.
Our Story
"Every watch tells
a story. Yours
should be custom."
MHI Customs was built on a passion for horology and the art of transformation. Every Seiko that leaves our bench has been stripped, rebuilt and finished to a standard you won’t find on the high street. Based in the UK, we build for people who want something truly one of a kind.
Start Your Build
Example Builds

We Build Anything.

These are just a few examples of what we can do — we're not limited to these styles. GMT, Daytona, Datejust, Arabic dial, custom concepts, matching sets — if you can imagine it, we can build it. Just get in touch.

∞
BUILD POSSIBILITIES
Datejust Style
DATEJUST STYLE
The Classic
Clean lines, fluted bezel, jubilee bracelet. Our most popular style — available in any dial colour or case finish.
Commission This Style →
GMT Master Style
GMT MASTER STYLE
The Traveller
Two-tone bezel, dual time zone display, jubilee bracelet. Bold and distinctive.
Commission This Style →
Arabic Dial Style
ARABIC DIAL STYLE
The Statement
Striking Arabic numerals, sunray dial, polished case. A real conversation piece.
Commission This Style →
Daytona Style
DAYTONA STYLE
The Chronograph
Tachymeter bezel, three subdials, oyster bracelet. Sporty and refined.
Commission This Style →
His and Hers Set
HIS & HERS SET
The Matching Set
Two watches, one vision. Matching dials, matching finishes — a perfect pair built for two.
Commission This Style →
Custom Build
Don't See
What You Want?
We can build almost anything. Just describe your idea and we'll make it happen.
NOT SEEING WHAT YOU WANT?
We can build any watch style — just ask.
Send us a photo, a description, or just an idea. We'll work with you to create something completely unique.
Tell Us Your Idea →
Handbuilt to Order
Every watch is assembled by hand — no mass production, no shortcuts, ever
1 Year Warranty
Full parts and movement coverage from the day you receive it
Handbuilt in UK
Carefully assembled and finished by hand before every dispatch
Bespoke Commissions
Fully custom builds made to your exact personal specification
Follow the Build
Find Us Online
Instagram  ·  @mhicustoms TikTok  ·  @mhicustoms Snapchat  ·  @mhicustoms