Custom Mod Watches
Time, reassembled
by hand.
Every Calibre Mod Co piece is built from the case up — GMT and Datejust mod watches finished one at a time, for people who want their timepiece to look like no one else's.
The Collection
Featured Timepieces
Anatomy of a Build
Inside every watch.
01/Movement
Seiko NH35 automatic calibre
The heart of every build. A proven Japanese workhorse with hacking seconds and hand-winding, serviceable by any watchmaker.
- Jewels
- 24Jewels
- Beats / hour
- 21,600Beats / hour
- Power reserve
- 41hPower reserve
02/Automatic
Powered by your wrist
No battery, ever. The rotor winds the mainspring with every movement of your arm, so the watch keeps running for as long as you wear it.
03/Water resistant
Sealed against the elements
Crystal, crown and caseback are fitted with gaskets and sealed by hand, giving a water-resistant build made for everyday wear.
04/Hand-built
Professionally assembled
Case, dial, hands and bezel are assembled one watch at a time, then regulated and inspected before your build leaves the bench.
Our Craft
Every watch is built,
not just bought.
We start with proven automatic movements and rebuild each case, dial and bezel by hand. GMT and date complications are fitted and regulated one piece at a time, then finished on a stainless steel oyster-style bracelet — so what arrives at your door is a genuinely custom build, not an assembly-line watch with a new face.
Stainless Steel Case
Hand-Assembled Builds
Stay in the Loop
New builds, first access.
Join the list for early access to limited mod releases and behind-the-scenes builds.