Product Description
The Casio G-Shock GA-2100-1A3 Black is a colorway from the GA-2100 series, Casio's landmark CasiOak that G-Central confirmed became one of G-Shock's bestselling models ever after its launch, arriving at the right time as preference shifted toward smaller watches and attracting a younger generation of fans to the brand through its fusion of the original DW-5000C's octagonal silhouette with a dramatically slimmer profile made possible by the Carbon Core Guard carbon fiber-reinforced resin case. As confirmed by the official Casio product page and Amazon's full specification listing, the GA-2100-1A3 is constructed with Carbon Core Guard structure, a carbon and resin case and bezel, and a resin band measuring 48.5 by 45.4 by 11.8 millimeters and weighing 51 grams, powered by an SR726W X 2 battery with approximately 3-year life. The 1A3 colorway is the Utility Black Series execution of the GA-2100, which Casio's official product page described as textured matte black with vibrant neon color accents providing a stylishly cool contrast, with phosphorescent Neobrite paint on the hour and minute hands for visibility in the dark. Features confirmed across Amazon and NY Watch Store include 200-meter water resistance, world time covering 31 time zones and 48 cities, a 1/100-second stopwatch, countdown timer, five daily alarms, double LED light, full auto-calendar to 2099, and the hand shift feature that moves the analog hands out of the way for an unobstructed view of the digital display. Retail price $130.
The Casio G-Shock GA-2100-1A3 Black is the bestselling CasiOak for the G-Shock collector who wants the Carbon Core Guard octagonal construction, Neobrite hands, hand shift feature, 200M water resistance, and 3-year battery in the neon-accented matte black Utility Black Series colorway from the foundational GA-2100 lineup.
The Casio G-Shock GA-2100-1A3 Black has a retail price of $130.
