CASIO G-SHOCK GM-2100G-1A9JF New Digital-Analog Combination Metal Covered Series WatchOverview The GM 2100G 1A9JF continues G SHOCKs legacy of toughness with a sleek, fashionable twist. Part of the Metal Covered Series, this model features a striking black metal bezel with a luxurious gold ion plated finish, creating a sophisticated look suitable for both casual and formal occasions. The octagonal bezel design, iconic to the GM 2100 line, pairs with a robust digital analog display to offer both style and function in one compact watch.