Casio G-Shock Gravitymaster Twin Sensor World Time GA-1100-1A1 GA1100-1A1 Men's WatchCasio G Shock Gravitymaster Twin Sensor World Time GA 1100 1A1 GA1100 1A1 Men's Watch A new addition to the MASTER OF G Series, the GRAVITYMASTER boasts of a uniform black coloring offset by red, blue and yellow accents on its dial components. A well thought collection of multiple, utilitarian features; the Casio G Shock Gravitymaster Twin Sensor World Time watch is a piece you can wear as much as on an ordinary day as to some serious outdoor