G-Shock by Casio GG-1000-1A watch. Part of the Master of G Mudmaster Series. Mud Resist construction helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge. Multiple gaskets are used on the pipes that guide buttons and shafts, which keeps mud out. These pipes not only act to protect buttons from impact, they also enhance button operation. The face is illuminated by a Super Illuminator, high-brightness auto LED light to ensure high visibility under virtually any conditions imaginable.