Casio GA-2100-4A

Compact toughness with color confidence.

The GA-2100-4A keeps the GA-2100’s thin, octagonal case but turns up the visual energy with a bold rose-coral finish and a layered dial. The result: a watch that reads “style-first” yet doesn’t sacrifice G-SHOCK’s durability. 

Why it matters: This model proves you don’t need bulky cases to make a statement. The combination of Carbon Core Guard structure and standout color makes it as much fashion piece as functional gear. 

The GA-2100’s engineering challenge was making a thinner shock-resistant case. That’s achieved by a strong external structure plus a compact module — letting the design team focus on color without compromising strength.

Specs Snapshot