Casio GA-2100-1A1

Octagonal attitude, blackout energy.

The GA-2100-1A1 pares G-SHOCK’s DNA down to a single, confident silhouette — an octagonal bezel inspired by the original DW-5000C but thinned for modern wear. What you get is the iconic GA-2100 profile in full blackout: sculptural, light on the wrist, and built to take a beating without looking like it does. It’s the piece for style-savvy buyers who demand durability and design. 

Why it matters: The case uses carbon-reinforced fine resin that keeps the profile slim (11.8 mm) while preserving shock resistance and 200-meter water resistance — that’s G-SHOCK resilience in a silhouette that reads design-first, tool-second. 

Achieving 11.8 mm thickness on a shock-resistant watch required a slim module and carbon-reinforced structure — it wears leaner while still being genuinely rugged.

Specs Snapshot