In addition to the shock resistance of G-SHOCK, the MASTER OF G series was designed with outstanding functions to withstand use in harsh natural environments on land, at sea, and in the air. The latest version of this legendarily tough series, the MUDMASTER GG-B100, sets a high bar in proving that a rugged watch designed to play in the most extreme environments can also deliver an understated handsomeness to the wrist, though it has a long line of predecessors to thank for the ease with which it accomplishes so much.
The pioneer of this series was the DW-5500C, which was introduced in 1985 and featured a mud-resist structure on the push buttons to dustproof and mudproof. The DW-6100, equipped with a temperature sensor, followed in 1992, and the DW-6700, with a pressure sensor in addition to the temperature sensor, was released in 1994, attracting attention for its added performance not seen in previous G-Shocks. The DW-6300 was a turning point in the history of G-Shock, not only because it was the first full-fledged G-Shock diver's watch, with its outstanding ISO-compliant 200-meter water resistance, but also because it was the first to be given the pet name “Frogman”, establishing the concept of the MASTER OF G series.