Casio MT-G G-Shock Atomic MTG-S1000D-1A4JF Mens WatchCasio MT G G Shock Atomic MTG S1000D 1A4JF Men's Watch Casios new addition combines metal to resin. This attractive, high function timepiece is built on a Core Guard Structure that resists shocks better than ever. The bezel and back cover are all metal, the latter also creating a frame that reduces further shocks to the inner mechanisms. The rest is the wonder of the gel; it absorbs impacts which might damage the 3D dial.