Seiko 5 Sports GMT SSK001 vs San Martin SN0123 GMT
Both are gmt / travel watches in the mid tier — here's how the specs differ and which to pick.
| Spec | Seiko 5 Sports GMT SSK001 | San Martin SN0123 GMT |
|---|---|---|
| Movement | Automatic | Automatic |
| Water resistance | 100m | 200m |
| Case size | 42.5mm | 39mm |
| Crystal | hardlex | sapphire |
| Style | GMT / travel | GMT / travel |
| Price tier | Mid | Mid |
Which should you buy?
- the San Martin SN0123 GMT takes more water (200m) — the one to pick if you actually swim or dive
- the San Martin SN0123 GMT has a sapphire crystal — more scratch-resistant for daily wear
- the Seiko 5 Sports GMT SSK001 wears 42.5mm vs the San Martin SN0123 GMT's 39mm — choose by wrist size
Where to buy
Check the Seiko 5 Sports GMT SSK001 price on Amazon →
Check the San Martin SN0123 GMT price on Amazon →
FAQ
What's the difference between the Seiko 5 Sports GMT SSK001 and the San Martin SN0123 GMT?
Both are gmt / travel watches in the mid tier. The Seiko 5 Sports GMT SSK001 is automatic, 100m water resistance, 42.5mm, hardlex crystal; the San Martin SN0123 GMT is automatic, 200m water resistance, 39mm, sapphire crystal.
Which has better water resistance, the Seiko 5 Sports GMT SSK001 or the San Martin SN0123 GMT?
The San Martin SN0123 GMT, rated 200m, versus 100m on the other. Pick 100m or higher for swimming and 200m+ for diving.
Which is better value, the Seiko 5 Sports GMT SSK001 or the San Martin SN0123 GMT?
Both sit in the mid tier, so it comes down to movement, water resistance and case size — see the spec table above.
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