G-ShockThe first G-Shock was born in April 1983, called the Casio DW-5000C. It follows the triple ten concept:
- 10 year battery life
- 10 bar water resistant
- 10m fall resistant on a hard surface
The shock resistant design has 10 layers protecting the quartz time mechanism, including the urethane rubber outer bumper protecting the steel watch case, the stainless steel case, the hardened mineral glass watch crystal, the stainless steel screwed down caseback, and the "floating module" where the quartz mechanism floats free in a urethane foam cradle, with the outer buttons and LCD module attached with flexible cables.