Bulova Marine Star vs Casio G-Shock Mudmaster GG-B100

Both are everyday watches in the mid tier. In short: the Casio G-Shock Mudmaster GG-B100 takes more water (200m) — both are fine for swimming, but it has more margin if you dive. The Bulova Marine Star is quartz, 100m water resistance, 44mm, mineral crystal; the Casio G-Shock Mudmaster GG-B100 is quartz, 200m water resistance, 53mm, mineral crystal.

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

Spec	Bulova Marine Star	Casio G-Shock Mudmaster GG-B100
Movement	Quartz	Quartz
Water resistance	100m	200m
Case size	44mm	53mm
Crystal	mineral	mineral
Style	Everyday / casual	Everyday / casual
Price tier	Mid	Mid

Which should you buy?

The Casio G-Shock Mudmaster GG-B100 takes more water (200m) — both are fine for swimming, but it has more margin if you dive
The Bulova Marine Star wears 44mm vs the Casio G-Shock Mudmaster GG-B100's 53mm — choose by wrist size

Where to buy

Bulova Marine StarSee price on AmazonCheck price

Casio G-Shock Mudmaster GG-B100See price on AmazonCheck price

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FAQ

What's the difference between the Bulova Marine Star and the Casio G-Shock Mudmaster GG-B100?
Both are everyday watches in the mid tier. The Bulova Marine Star is quartz, 100m water resistance, 44mm, mineral crystal; the Casio G-Shock Mudmaster GG-B100 is quartz, 200m water resistance, 53mm, mineral crystal.

Which has better water resistance, the Bulova Marine Star or the Casio G-Shock Mudmaster GG-B100?
The Casio G-Shock Mudmaster GG-B100, rated 200m, versus 100m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Bulova Marine Star or the Casio G-Shock Mudmaster GG-B100?
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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