For 25 years Casio G-Shock digital watches are the ultimate tough watch. Providing durable, waterproof digital watches for every activity. Known for its resistance to shocks (e.g. hard knocks and strong vibrations). They were, and continue to be, designed primarily for sports, military, and outdoor adventure oriented activities. Is your watch G-Shock tough? Brand new, Authentic, First quality with all Original Parts & Serial numbers. NO Replicas!