G-Shock / GA-2100-1A1

GA-2100 Blackout

An octagonal shape with attitude.

Consider it: for an active routine.

Quartz45.4 mm wideResin strap

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Included on Casio’s US Best Sellers page, checked October 13, 2026. The page retains a 2025 heading; this is not a verified current sales rank. Popularity source ↗

Why consider it

The all-black GA-2100 combines analog hands with digital tools in a shock-resistant case. Its 11.8 mm thickness is worth considering if you want a sports watch without an especially tall profile.

The tradeoff

The dark hands and markers prioritize the monochrome look; consider a contrasting dial if quick readability matters most. This model uses batteries rather than solar charging.

THE ESSENTIALS

Know what you’re choosing.

48.5 × 45.4 × 11.8 mm case
Carbon/resin case; mineral glass
200 m water resistance
World time, alarms and countdown timer

Manufacturer specifications ↗

BEFORE YOU BUY

Look beyond the headline.

Check that the selected color and reference match GA-2100-1A1. Amazon listings can contain multiple variants. Compare the seller, shipping costs, return terms and warranty coverage before purchasing.

Researched October 13, 2026. This is an editorial selection based on manufacturer information, not a hands-on review or a claim of a current discount.

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