Seiko Prospex SPB143 vs Seiko Prospex Sumo SPB103
Both are dive watches in the upper tier — here's how the specs differ and which to pick.
| Spec | Seiko Prospex SPB143 | Seiko Prospex Sumo SPB103 |
|---|---|---|
| Movement | Automatic | Automatic |
| Water resistance | 200m | 200m |
| Case size | 40.5mm | 45mm |
| Crystal | sapphire | sapphire |
| Style | Dive | Dive |
| Price tier | Upper | Upper |
Which should you buy?
- the Seiko Prospex SPB143 wears 40.5mm vs the Seiko Prospex Sumo SPB103's 45mm — choose by wrist size
Where to buy
Check the Seiko Prospex SPB143 price on Amazon →
Check the Seiko Prospex Sumo SPB103 price on Amazon →
FAQ
What's the difference between the Seiko Prospex SPB143 and the Seiko Prospex Sumo SPB103?
Both are dive watches in the upper tier. The Seiko Prospex SPB143 is automatic, 200m water resistance, 40.5mm, sapphire crystal; the Seiko Prospex Sumo SPB103 is automatic, 200m water resistance, 45mm, sapphire crystal.
Which is better value, the Seiko Prospex SPB143 or the Seiko Prospex Sumo SPB103?
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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