The G-Shock GA-2100 was launched in 2019 and quickly reached classic status in just a few years, achieving a place alongside such long-running models like the DW-5600 from the ’80s, the DW-6900 from the ’90s, and the GA-110 from the ’10s. The GA-2100 is akin to a DW-5600 in an analog-digital form. The bezel and band of the watch borrows their shapes from the classic DW-5000 origin model, and the octagonal bezel has earned it the nickname “CasiOak” among fans.
Size: Medium Dimensions (L x W x H): 48.5 x 45.4 x 11.8 mm Weight:Â 51 grams Module:5611 (instruction manual at casio.com) Battery Type (Lifespan): SR726W X 2 (approx. 3 years) Series Launch Year: 2019 Nickname: CasiOak
Notable Features: Carbon Core Guard, World Time, Stopwatch, Timer, 5 Daily Alarms, Double LED Light with LCD Backlight
Note: Some GA-2100 models have Neobrite luminous hands, but the full black GA-2100-1A1 does not. It has some sort of lume, but it is not as bright as the Neobrite lume. (We also noticed that the Neobrite spec was later removed on the other two launch models: GA-2100-1A and GA-2100-4A.
See full specifications for GA2100-1A1 under “Additional information” tab above.
The G-Shock GA-2100 was launched in 2019 and quickly reached classic status in just a few years, achieving a place alongside such long-running models like the DW-5600 from the ’80s, the DW-6900 from the ’90s, and the GA-110 from the ’10s. The GA-2100 is akin to a DW-5600 in an analog-digital form. The bezel and band of the watch borrows their shapes from the classic DW-5000 origin model, and the octagonal bezel has earned it the nickname “CasiOak” among fans.
200-Meter Water Resistance, Magnetic Resistant, Shock Resistant
Resin
Resin
Resin
Mineral
CR1220
2 Years
Home/World Time City Swap, World Time
29
48 + UTC
DST On/Off
Speed Indicator, Stopwatch
1/1000 second
99:59’59.999”
elapsed time, lap times, split time
Auto-repeat, Countdown Timer
1 second
24 hours
1 minute to 24 hours
1 minute
5 Daily with 1 Snooze
Hourly Time Signal
1.5 or 3 Second Afterglow, Auto, LED
Amber
Full Auto Calendar to 2099
12/24-Hour Format
145 to 215
Some specs for individual models may differ within a series, such as price, materials, weight, etc. Specs are subject to change and are not guaranteed to be accurate here. Dollar prices are in U.S. currency unless otherwise noted. Click the link icons in the gallery images to view our articles on specific models. Gallery images labeled with "(casio.com)" are linked to an official Casio product page. Follow your country's official G-Shock site (gshock.casio.com) for specs on individual models and more release information. About The Specs Catalog | Features Glossary | Specs Home
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8Expert Score
G-Shock GA-2100 Rating By G-Central
The G-Shock GA-2100 is recommended for those who want a simple, compact, and lightweight analog-style watch. The digital functions like world time, stopwatch, and timer, may also come in handy, but the small LCD makes using them more challenging than a full digital model.
Build
8
Functions
7
Value
9
PROS
The slimmest active G-Shock model for men.
Lightweight, lighter than the DW-5600.
LCD has a backlight (unlike the GA-1XX series).
Clean dial design.
CONS
LCD display is very small.
Not all models have Neobrite lume.
LED light for hands is not very strong.
No auto activation setting for light.
Needs maintenance (battery replacement) every few years.
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