WatchSpecDBwatches, by spec

Mido Ocean Star 200C 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

SpecMido Ocean Star 200CSeiko Prospex Sumo SPB103
MovementAutomaticAutomatic
Water resistance200m200m
Case size42.5mm45mm
Crystalsapphiresapphire
StyleDiveDive
Price tierUpperUpper

Which should you buy?

Where to buy

Check the Mido Ocean Star 200C price on Amazon →

Check the Seiko Prospex Sumo SPB103 price on Amazon →

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which watches we compare.

FAQ

What's the difference between the Mido Ocean Star 200C and the Seiko Prospex Sumo SPB103?
Both are dive watches in the upper tier. The Mido Ocean Star 200C is automatic, 200m water resistance, 42.5mm, sapphire crystal; the Seiko Prospex Sumo SPB103 is automatic, 200m water resistance, 45mm, sapphire crystal.

Which is better value, the Mido Ocean Star 200C 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 · Seiko Prospex Sumo SPB103 vs Casio G-Shock Frogman GWF-A1000 · Casio Duro MDV106 (Marlin) vs Orient Mako II · all dive watches · all comparisons