Hover to zoom · tap for full screenCASIO G-SHOCK GA-2100-1A1 Men's Watch
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100% authentic G-SHOCK with official warranty, shipped from our store in Thailand.
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Specifications
Basics
- Case size (W × L × H)
- 48.5 × 45.4 × 11.8 mm
- Weight
- 51 g
- Case / bezel material
- Case / bezel material
- Carbon / Resin
- Band
- Resin band
- Construction
- Shock resistant
- Carbon Core Guard structure
- Water resistance
- 200 m water resistant
- Power supply & battery life
- Approx. battery life
- Approx. 3 years on SR726W X 2
Exterior
- Glass
- Mineral glass
World time
- 1/100-second stopwatch
- 00'00''00~59'59''99 (first 60 min) 1:00'00~23:59'59 (after 60 min) Measuring unit: 1/100 s (first 60 min) 1 s (after 60 min) Measuring modes: Elapsed time, split time 1st–2nd place times
Timer
- Countdown timer unit
- 1 s Countdown range: 24 hours Countdown start time setting range: 1 s to 24 h (1 s, 1 min, 1 h steps)
Hourly time signal
- 5 daily alarms
Light colour
- LED light
- White
Calendar
- Full auto calendar (to year 2099)
Mute
- Button tone on/off
Accuracy
- Accuracy
- ±15 s per month
Other features
- 12/24-hour format
- Hand shift feature (hands move aside to show the digital display)
About the GA-2100-1A1
The GA-2100-1A1 is the all-black model of the G-SHOCK GA-2100 series — the octagonal design collectors call the "CasiOak". The case is just 11.8 mm thick and weighs 51 g, built on a Carbon Core Guard structure. 200 m water resistant, powered by two SR726W batteries (about 3 years), with an analog-digital display, world time, stopwatch, countdown timer and alarms.
Also known as: CasiOak · GA-2100-1A1DR · GA-2100-1A1JF · GA-2100-1A1ER
Frequently asked questions
Is the GA-2100-1A1 the "CasiOak"?
Yes. CasiOak is the nickname for the octagonal G-SHOCK GA-2100 series, and the GA-2100-1A1 is its all-black version.
What's the difference between the GA-2100 and GA-B2100?
Same octagonal design, but the GA-B2100 adds solar charging (Tough Solar) and Bluetooth phone connection. The GA-2100 uses standard batteries, so it costs less.
How water resistant is the GA-2100-1A1?
200 m — fine for swimming and snorkelling. Don't press the buttons underwater, and avoid hot water and saunas.
Are GA-2100-1A1DR, GA-2100-1A1JF and GA-2100-1A1ER the same watch?
Yes. The suffix (DR, JF, ER, etc.) is the market code. The watch itself is the same GA-2100-1A1; watches sold in Thailand are mostly the DR version.
Customer reviews
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