Master of G is also known as the “Professional Series” and consists of specialty watches that are targeted towards certain occupations and activities.Master of G watches are ruggedly stylish, and have a certain prestige among G-SHOCK enthusiasts. The history of the Master of G line goes back to 1985 with the introduction of the mud-resistant DW-5500C which was nicknamed the Mudman. The Frogman first appeared in 1993 as a large ISO 200M dive watch featuring an asymmetrical case design and was the first official “Man” series watch. It would see several design changes and feature some of the most iconic G-SHOCK cases. Casio indulged the collectors market with many limited models featuring unique color schemes, particularly with the GW-200 series, and that limited edition tradition continues with current models.
Each model fits into one of three categories: LAND, SEA, or AIR.