Seiko 5 Sport SRPD vs Casio G-Shock Mudmaster GG-B100
Both are everyday / casual watches in the mid tier — here's how the specs differ and which to pick.
| Spec | Seiko 5 Sport SRPD | Casio G-Shock Mudmaster GG-B100 |
|---|---|---|
| Movement | Automatic | Quartz |
| Water resistance | 100m | 200m |
| Case size | 42.5mm | 53mm |
| Crystal | hardlex | mineral |
| Style | Everyday / casual | Everyday / casual |
| Price tier | Mid | Mid |
Which should you buy?
- the Seiko 5 Sport SRPD is mechanical (automatic) for the enthusiast feel and no battery; the Casio G-Shock Mudmaster GG-B100 is quartz for accuracy and low maintenance
- the Casio G-Shock Mudmaster GG-B100 takes more water (200m) — the one to pick if you actually swim or dive
- the Seiko 5 Sport SRPD wears 42.5mm vs the Casio G-Shock Mudmaster GG-B100's 53mm — choose by wrist size
Where to buy
Check the Seiko 5 Sport SRPD price on Amazon →
Check the Casio G-Shock Mudmaster GG-B100 price on Amazon →
FAQ
What's the difference between the Seiko 5 Sport SRPD and the Casio G-Shock Mudmaster GG-B100?
Both are everyday / casual watches in the mid tier. The Seiko 5 Sport SRPD is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Casio G-Shock Mudmaster GG-B100 is quartz, 200m water resistance, 53mm, mineral crystal.
Which has better water resistance, the Seiko 5 Sport SRPD 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 Seiko 5 Sport SRPD 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.
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