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GMTeiko | Pepsi -
GMTeiko | Coke -
GMTeiko | Two Tone -
GMTeiko | Gold -
GMTeiko | Rootbeer -
GMTeiko | Bruce Wayne -
Seikomariner | Sprite -
Seikomariner | Purple Black -
Seikomariner | Batman -
Seikomariner | Classic Black Jubilee -
Seikomariner | Hulk -
Seikomariner | Sky Blue -
Seikomariner | Marine Blue -
Seikomariner | Kermit -
Seikomariner | Classic Black Oyster
Seiko Submariner and Seiko GMT — Two Icons, One Collection
The Seiko Submariner and Seiko GMT are different watches solving different problems, so we've built them as two distinct lines instead of forcing one dial to do both jobs. The Seikomariner is the diver — rotating bezel, 41mm case, built for the version of you that actually gets in the water. The GMTeiko is the traveller — a true independent GMT hand, not a fake 24-hour marker glued to the dial.
The Submariner Side
Seikomariner runs on the Seiko NH35 automatic with a genuinely functional rotating bezel and 5ATM water resistance. Bracelet options run oyster, jubilee, or both depending on the colourway — Batman, Kermit, and the classic black dials all live here, each hand-assembled with the same attention as the diver they're inspired by. The bezel actually rotates and clicks into place — it's not a fixed ring pretending to be functional.
The GMT Side
GMTeiko is built around the NH34 automatic movement — the key detail being an independently adjustable GMT hand, so you can actually track a second time zone without resetting your local time every time you cross a border. Pepsi and Coke colourways come with a choice of jubilee or oyster bracelet, alongside two-tone and gold options, which are jubilee only. That independent hand is the whole point: set it once for home time, adjust the hour hand freely when you land, and you've always got both.
Why Two Lines Instead of One
A dive watch and a GMT solve different problems — one's about depth rating and a bezel you can time with, the other's about tracking two time zones without carrying a second watch. Cramming both into one dial usually means neither works properly. Keeping them separate means each movement, bezel, and bracelet choice is doing exactly one job well.
Built for 5ATM, Not Just Photos
Both lines carry 5ATM water resistance, sapphire crystal, and 316L stainless steel — enough for swimming, showering, and everyday knocks, not just sitting in a display case. Hand-assembled in Sweden. Whether you want the diver's bezel or the traveller's second hand, this is a Seiko mod Submariner and GMT collection built for real use.
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FREQUENTLY ASKED QUESTIONS
What is a Seiko Mod?
A Seiko Mod is a custom-built watch, hand-assembled with a reliable automatic or hybrid Seiko movement. It's paired with premium aftermarket parts to create a watch that's uniquely yours!
Do they come with any kind of warranty?
Yes. All watches ship with a 1-year warranty covering movement-related issues.
I like a watch, but want a different strap/dial.
No problem. Message us before you order - we can customize it for you.
How long does assembly take?
Assembly takes about 7-12 business days. That's because every watch is built entirely to order. We source the parts you've chosen, hand-assemble everything with care, and run a full quality check before it ships. That way you get a custom watch built to last.
Do you ship internationally?
Yes, we ship worldwide. Standard shipping rates apply and are calculated at checkout.
MORE QUESTIONS?
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