Casio G-Shock Digital Watch DW5600RRB-4 RedCasio G Shock Digital Watch DW5600RRB 4 Red The Casio G Shock DW5600 the original G Shock shape. First introduced in 1983, the square case is the silhouette that defined shock resistant watches. 200m water resistance, stopwatch, countdown timer, alarm, and EL backlight. No frills, no complications just the watch that started it all. If you only own one G Shock, this is the one. Specs 200m water resistance Stopwatch, countdown timer, alarm EL backlight