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Seiko Prospex Monster SRPD25 vs Glycine Combat Sub

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

Last verified 2026-06-27 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

SpecSeiko Prospex Monster SRPD25Glycine Combat Sub
MovementAutomaticAutomatic
Water resistance200m200m
Case size42mm42mm
Crystalhardlexsapphire
StyleDiveDive
Price tierMidMid

Which should you buy?

Where to buy

Check the Seiko Prospex Monster SRPD25 price on Amazon →

Check the Glycine Combat Sub price on Amazon →

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FAQ

What's the difference between the Seiko Prospex Monster SRPD25 and the Glycine Combat Sub?
Both are dive watches in the mid tier. The Seiko Prospex Monster SRPD25 is automatic, 200m water resistance, 42mm, hardlex crystal; the Glycine Combat Sub is automatic, 200m water resistance, 42mm, sapphire crystal.

Which is better value, the Seiko Prospex Monster SRPD25 or the Glycine Combat Sub?
Both sit in the mid tier, so it comes down to movement, water resistance and case size — see the spec table above.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-27. Copy a ready-made reference:

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