Casio G-Shock GMW-B5000D vs Citizen Series 8 NB6004

Both are everyday watches in the upper tier. In short: the Citizen Series 8 NB6004 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 is solar / light-powered, 200m water resistance, 43mm, sapphire crystal; the Citizen Series 8 NB6004 is automatic, 100m water resistance, 40mm, sapphire crystal.

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

Spec	Casio G-Shock GMW-B5000D	Citizen Series 8 NB6004
Movement	Solar / light-powered	Automatic
Water resistance	200m	100m
Case size	43mm	40mm
Crystal	sapphire	sapphire
Style	Everyday / casual	Everyday / casual
Price tier	Upper	Upper

Which should you buy?

The Citizen Series 8 NB6004 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 wears 43mm vs the Citizen Series 8 NB6004's 40mm — choose by wrist size

Where to buy

Casio G-Shock GMW-B5000DSee price on AmazonCheck price

Citizen Series 8 NB6004See price on AmazonCheck price

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FAQ

What's the difference between the Casio G-Shock GMW-B5000D and the Citizen Series 8 NB6004?
Both are everyday watches in the upper tier. The Casio G-Shock GMW-B5000D is solar / light-powered, 200m water resistance, 43mm, sapphire crystal; the Citizen Series 8 NB6004 is automatic, 100m water resistance, 40mm, sapphire crystal.

Which has better water resistance, the Casio G-Shock GMW-B5000D or the Citizen Series 8 NB6004?
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 Casio G-Shock GMW-B5000D or the Citizen Series 8 NB6004?
Both sit in the upper 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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