Seiko Prospex Sumo SPB103 vs Halios Seaforth
Both are dive watches in the upper tier — here's how the specs differ and which to pick.
| Spec | Seiko Prospex Sumo SPB103 | Halios Seaforth |
|---|---|---|
| Movement | Automatic | Automatic |
| Water resistance | 200m | 200m |
| Case size | 45mm | 41mm |
| Crystal | sapphire | sapphire |
| Style | Dive | Dive |
| Price tier | Upper | Upper |
Which should you buy?
- the Seiko Prospex Sumo SPB103 wears 45mm vs the Halios Seaforth's 41mm — choose by wrist size
Where to buy
Check the Seiko Prospex Sumo SPB103 price on Amazon →
Check the Halios Seaforth price on Amazon →
FAQ
What's the difference between the Seiko Prospex Sumo SPB103 and the Halios Seaforth?
Both are dive watches in the upper tier. The Seiko Prospex Sumo SPB103 is automatic, 200m water resistance, 45mm, sapphire crystal; the Halios Seaforth is automatic, 200m water resistance, 41mm, sapphire crystal.
Which is better value, the Seiko Prospex Sumo SPB103 or the Halios Seaforth?
Both sit in the upper tier, so it comes down to movement, water resistance and case size — see the spec table above.
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