Casio · G-Shock 2100
Casio G-Shock GA-2100-1A1 (reference GA-2100-1A1) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.
A slim, lightweight and highly durable analog-digital G-Shock that became a modern affordable design icon.
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Specifications last verified: 2026-08-03.
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