Casio G-Shock GA-2100-1 Carbon Core Guard Analog-Digital Black Resin Watch

Casio G-Shock GA-2100-1 Carbon Core Guard Analog-Digital Black Resin Watch

The Casio G-SHOCK GA-2100-1A1 combines G-SHOCK's legendary toughness with a sleek, minimalist design. Nicknamed the "CasiOak" by enthusiasts due to its iconic octagonal bezel, this analogue-digital watch draws inspiration from the original G-SHOCK DW-5000C while incorporating modern materials and advanced technology. Its stealthy all-black finish delivers a clean, understated look that's equally at home in the office, outdoors, or on the street.

Built with Casio's innovative Carbon Core Guard Structure, the GA-2100-1A1 uses a carbon fibre-reinforced resin case to provide exceptional strength while keeping the watch remarkably lightweight at just 51 grams. At only 11.8 mm thick, it's one of the slimmest G-SHOCK models ever produced, offering outstanding comfort for all-day wear without compromising durability.

The hybrid analogue-digital display provides easy access to a wide range of functions including world time across 31 time zones, a 1/100-second stopwatch, 24-hour countdown timer, five daily alarms, a full auto calendar, and double Super Illuminator LED lighting for excellent visibility in low-light conditions. The convenient Hand Shift function temporarily moves the analogue hands out of the way for an unobstructed view of the digital display.

With 200-metre water resistance, shock resistance, mineral glass protection, and an approximate 3-year battery life, the GA-2100-1A1 is built for demanding environments while maintaining a refined, contemporary appearance. Whether you're an outdoor adventurer, athlete, traveller, or simply looking for an everyday watch that can handle anything, the Casio G-SHOCK GA-2100-1A1 is a proven favourite.

Key Features

• Iconic octagonal "CasiOak" design

• Carbon Core Guard Structure for superior strength and lightweight comfort

• Slim 11.8 mm profile

• Shock-resistant construction

• 200-metre water resistance

• Analogue-digital display

• World time across 31 time zones (48 cities + UTC)

• 1/100-second stopwatch with split-time functionality

• 24-hour countdown timer

• Five daily alarms and hourly time signal

• Double Super Illuminator LED lighting

• Hand Shift feature for improved digital display visibility

• Full auto calendar through 2099

• Approximately 3-year battery life

• Ideal for everyday wear, sports, travel, and outdoor adventures

Specifications

| Specification

| Details

| Model

| Casio G-SHOCK GA-2100-1A1

| Collection

| G-SHOCK 2100 Series

| Display

| Analogue / Digital

| Movement

| Quartz

| Case Material

| Carbon Fibre-Reinforced Resin

| Bezel Material

| Resin

| Band Material

| Resin

| Glass

| Mineral Glass

| Construction

| Shock Resistant, Carbon Core Guard Structure

| Water Resistance

| 200 Metres (20 Bar)

| Case Size

| 48.5 × 45.4 × 11.8 mm

| Weight

| 51 g

| Compatible Wrist Size

| 145–215 mm

| Battery

| 2 × SR726W

| Battery Life

| Approx. 3 Years

| Accuracy

| ±15 Seconds Per Month

| World Time

| 31 Time Zones (48 Cities + UTC)

| Stopwatch

| 1/100-Second

| Countdown Timer

| Up to 24 Hours

| Alarms

| 5 Daily Alarms

| Hourly Time Signal

| Yes

| Calendar

| Full Auto Calendar (to Year 2099)

| Illumination

| Double Super Illuminator LED (Face & Digital Display)

| LED Colour

| White

| Hand Shift Feature

| Yes

| Time Format

| 12/24-Hour

| Button Tone

| On/Off

| Colour

| Black

Learn more about Casio

View more Casio at OneStopMusic

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