Casio designers took it upon themselves to create the world's toughest watch, and in 1983, the G-Shock was born. Built with a 10m free-fall endurance, 10-bar water resistance and 10-year battery life, it's the ultimate in durability and has been wildly popular since its release. Toughen up your style with a digital or analogue version in the signature chunky, unbreakable case.