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Seiko Prospex Willard SPB153 vs Seiko Prospex Monster SRPD25

Both are dive watches in the mid tier. In short: the Seiko Prospex Willard SPB153 has a sapphire crystal — more scratch-resistant for daily wear. The Seiko Prospex Willard SPB153 is automatic, 200m water resistance, 43mm, sapphire crystal; the Seiko Prospex Monster SRPD25 is automatic, 200m water resistance, 42mm, hardlex crystal.

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

SpecSeiko Prospex Willard SPB153Seiko Prospex Monster SRPD25
MovementAutomaticAutomatic
Water resistance200m200m
Case size43mm42mm
Crystalsapphirehardlex
StyleDiveDive
Price tierMidMid

Which should you buy?

The Seiko Prospex Willard SPB153 has a sapphire crystal — more scratch-resistant for daily wear.

Where to buy

Seiko Prospex Willard SPB153See price on AmazonCheck price

Seiko Prospex Monster SRPD25See price on AmazonCheck price

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FAQ

What's the difference between the Seiko Prospex Willard SPB153 and the Seiko Prospex Monster SRPD25?
Both are dive watches in the mid tier. The Seiko Prospex Willard SPB153 is automatic, 200m water resistance, 43mm, sapphire crystal; the Seiko Prospex Monster SRPD25 is automatic, 200m water resistance, 42mm, hardlex crystal.

Which is better value, the Seiko Prospex Willard SPB153 or the Seiko Prospex Monster SRPD25?
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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