Seiko 5 Sport SRPD vs Casio G-Shock GMW-B5000D

Both are everyday watches. In short: the Seiko 5 Sport SRPD is mechanical (automatic) for the enthusiast feel and no battery; the Casio G-Shock GMW-B5000D is solar / light-powered for accuracy and low maintenance. The Seiko 5 Sport SRPD is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Casio G-Shock GMW-B5000D is solar / light-powered, 200m water resistance, 43mm, sapphire crystal.

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

Spec	Seiko 5 Sport SRPD	Casio G-Shock GMW-B5000D
Movement	Automatic	Solar / light-powered
Water resistance	100m	200m
Case size	42.5mm	43mm
Crystal	hardlex	sapphire
Style	Everyday / casual	Everyday / casual
Price tier	Mid	Upper

Which should you buy?

The Seiko 5 Sport SRPD is mechanical (automatic) for the enthusiast feel and no battery; the Casio G-Shock GMW-B5000D is solar / light-powered for accuracy and low maintenance
The Casio G-Shock GMW-B5000D takes more water (200m) — both are fine for swimming, but it has more margin if you dive
The Casio G-Shock GMW-B5000D has a sapphire crystal — more scratch-resistant for daily wear
The Seiko 5 Sport SRPD sits in the lower price tier (Mid) if budget leads

Where to buy

Seiko 5 Sport SRPDSee price on AmazonCheck price

Casio G-Shock GMW-B5000DSee price on AmazonCheck price

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FAQ

What's the difference between the Seiko 5 Sport SRPD and the Casio G-Shock GMW-B5000D?
Both are everyday watches. The Seiko 5 Sport SRPD is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Casio G-Shock GMW-B5000D is solar / light-powered, 200m water resistance, 43mm, sapphire crystal.

Which has better water resistance, the Seiko 5 Sport SRPD or the Casio G-Shock GMW-B5000D?
The Casio G-Shock GMW-B5000D, rated 200m, versus 100m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Seiko 5 Sport SRPD or the Casio G-Shock GMW-B5000D?
The Seiko 5 Sport SRPD is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

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

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