20 Bar (200M) Water Resistant. CASIO G-SHOCK GM-2100G-1A9JF Watch. Original CASIO Box. Shock Resistant Construction. Since its debut in 1983, G-SHOCK has continued to evolve while maintaining its legendary durability.

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20 Bar (200M) Water Resistant. CASIO G-SHOCK GM-2100G-1A9JF Watch. Original CASIO Box. Shock Resistant Construction. Since its debut in 1983, G-SHOCK has continued to evolve while maintaining its legendary durability.