Quartz Movement. Water Resistant 30 meters / 100 feet / 3 atm. In 1983, Casio launched the shockresistant GSHOCK watch. This product shattered the notion that a watch is a fragile piece of jewelry that needs to be handled with care, and was the result of Casio engineers taking on the challenge of creating the world's toughest watch. Using a tripleprotection design for the parts, module, and case, the GSHOCK offered a radical new type of watch that was unaffected by strong impacts or shaking. Its practicality was immediately recognized, and its unique look, which embodied its functionality, became wildly popular, resulting in explosive sales in the early 1990s. The GSHOCK soon adopted various new sensors, solarpowered radiocontrolled technology (described below), and new materials for even better durability. By always employing the latest technology, and continuing to transcend conventional thinking about the watch, the GSHOCK brand has become Casio's flagship timepiece product.