Seiko Prospex SPB143 vs Seiko Prospex Sumo SPB103
Both are dive watches in the upper tier. In short: the Seiko Prospex SPB143 wears 40.5mm vs the Seiko Prospex Sumo SPB103's 45mm — choose by wrist size. 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.
| 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
Seiko Prospex SPB143See price on AmazonCheck price
Seiko Prospex Sumo SPB103See price on AmazonCheck price
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.
More dive comparisons: Casio Duro MDV106 (Marlin) vs Orient Ray II · Seiko Prospex Turtle SRPE vs Seiko Prospex Solar Tuna SNE575 · Christopher Ward C60 Trident vs Marathon TSAR · Seiko Prospex Sumo SPB103 vs Casio G-Shock Frogman GWF-A1000 · dive watches under ~$1,500 · all dive watches · all comparisons