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Baltic Aquascaphe vs Seiko Prospex Sumo SPB103

Both are dive watches in the upper tier — here's how the specs differ and which to pick.

Last verified 2026-06-11 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

SpecBaltic AquascapheSeiko Prospex Sumo SPB103
MovementAutomaticAutomatic
Water resistance200m200m
Case size39mm45mm
Crystalsapphiresapphire
StyleDiveDive
Price tierUpperUpper

Which should you buy?

Where to buy

Check the Baltic Aquascaphe price on Amazon →

Check the Seiko Prospex Sumo SPB103 price on Amazon →

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FAQ

What's the difference between the Baltic Aquascaphe and the Seiko Prospex Sumo SPB103?
Both are dive watches in the upper tier. The Baltic Aquascaphe is automatic, 200m water resistance, 39mm, sapphire crystal; the Seiko Prospex Sumo SPB103 is automatic, 200m water resistance, 45mm, sapphire crystal.

Which is better value, the Baltic Aquascaphe 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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