Lorier Neptune vs Seiko Prospex Monster SRPD25

Both are dive watches in the mid tier. In short: the Seiko Prospex Monster SRPD25 has a hardlex crystal — more scratch-resistant for daily wear. The Lorier Neptune is automatic, 200m water resistance, 39mm, acrylic 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

Spec	Lorier Neptune	Seiko Prospex Monster SRPD25
Movement	Automatic	Automatic
Water resistance	200m	200m
Case size	39mm	42mm
Crystal	acrylic	hardlex
Style	Dive	Dive
Price tier	Mid	Mid

Which should you buy?

The Seiko Prospex Monster SRPD25 has a hardlex crystal — more scratch-resistant for daily wear
The Lorier Neptune wears 39mm vs the Seiko Prospex Monster SRPD25's 42mm — choose by wrist size

Where to buy

Lorier NeptuneSee price on AmazonCheck price

Seiko Prospex Monster SRPD25See price on AmazonCheck price

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FAQ

What's the difference between the Lorier Neptune and the Seiko Prospex Monster SRPD25?
Both are dive watches in the mid tier. The Lorier Neptune is automatic, 200m water resistance, 39mm, acrylic crystal; the Seiko Prospex Monster SRPD25 is automatic, 200m water resistance, 42mm, hardlex crystal.

Which is better value, the Lorier Neptune 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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