Casio G-Shock GA-2100 Watches

About the Watch in short. The budget G-Shock model with an octagonal case and the latest Carbon Core Guard protection. The GA-2100 form factor resembles the first G-Shock DW-5000C, but with a pronounced octagonal shape and more streamlined corners – this way the Japanese pay tribute to the glorious past of the high-impact direction. The carbon fiber that is used in the GA-2100 case makes the watch more durable and lighter, not to mention the case thickness of 11.8 mm – the series can be called the thinnest among all G-Shock with an analogue dial. An additional window shows the current day of the week, and more detailed information about the date can be viewed on the digital display. The set of features here is only basic [world time, timer, stopwatch, alarm clock, calendar], but they are enough for most everyday tasks.


Quick Content Guide

  1. Japanese approaches to Tough and Functional Watches in GA-2100! *the most distinctive features in details
  2. General information about the watch *year of first release, model range etc.
  3. GA-2100 Usage Patterns *what the watch is usually meant for
  4. Feedback from Users and Experts *anonymous from different sources
  5. GA-2100 Model Range *in different colors and bands
  6. The most distinctive specs *from our Editorial point of view
  7. Other G-Shock GA Watches *similar by price and functions but different by cases
  8. Official GA-2100 Video *only from Casio Company
  9. G-Shock GA-2100 on the wrist! *only images and only on the wrist
  10. Official GA-2100 Specs *all details and for base version GA-2100-1A1
  11. GA-2100 Comparison Table *with similar G-Shock Watches
  12. Full Photo Gallery *various images

Enjoy Japanese approaches to Tough and Functional Watches!

Octagonal Bezel. The bezel features the octagonal design motif maintained since the very first G-SHOCK. The outline a sense of stability, creating an expression of power worthy of the G-SHOCK.

Minimal Design. Use of the latest toughness-driven construction with carbon fiber-reinforced resin made it possible to slim the case to the utmost limit. The side profile design pays homage to the very first model with its button layout, uneven surface form and fixed-angle band.

Dimensional Dial. With a sense of depth achieved with three-dimensional molding, the dial features a minute-mark-notched dial ring, three-dimensional index cuts, a mode dial and irregular shaped LCD in a sweetly balanced arrangement. The spacious layout makes for a face design offering simplicity as well as excellent visibility.

Monochromatic Color. The GA-2100 line comes in a thoroughly fashion-conscious color scheme. The GA-2100-4A boasts 9 different shades of red. The application of a different shade for each component — from the case exterior to the dial, dial ring, hands, LCD, buckles and more — gives the watch an overall integrated look, while bringing out an irresistible textural feel in its detailing.

Carbon Core Guard Structure. The module is protected with a carbon fiber-reinforced resin case. The special characteristics of the carbon fiber material — light weight, high strength and superior weather resistance — were leveraged to make the case as slim and compact as possible, with no compromise on shock resistance.

The Challenge of a Thinner Case. The developers pursued a thinner design while still satisfying the original G-SHOCK criteria for shock resistance. They strengthened the external structure and slimmed the module, achieving wafer-thin at just 11.8mm.

Thin Module. The module was slimmed by miniaturizing the componentry and employing optimized, high-density mounting for the circuit board structure. Combined with the Carbon Core Guard structure, these efforts made for an astonishingly smaller, slimmer case.

Double LED Light. The double LED with high luminance brightly illuminates the dial and LCD to ensure readability in the dark.

Slide Lever. A slide lever makes it easy to attach and remove the band — a very handy feature for cleaning and other maintenance.

Shock-Resistant Structure and 200m Water Resistance. The shock-resistant structure protects the watch. With 200m water resistance as well, the watch is ideal for use in a wide range of locations and situations.

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General Information

Price100$ *average Amazon Price, we may earn commission from purchases
Year of first Release2019
Module Number5611 / Manual
Model RangeSTANDART ANA-DIGI (This Line includes Digital and Analog displays on G-Shocks that are the best in “price/quality” category. Usually have traditional digital functions, but with beautiful hands. Don’t worry, the hands won’t prevent you from seeing digits, since there is a special Hand Shift technology that moves them to the neutral position)
Battery TypeSR726W × 2 (G-Shock Batteries)
Buy Battery on Amazon →
Other Divisions the GA-2100 belongs to: *you may find all watches of the division by clicking on the linkG-Shock Ana-Digi
G-Shock Carbon Core Guard

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GA-2100 Usage Patterns *what the watch is usually meant for

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Feedback from Users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

PROs
+ lightweight
+ attractive watch face
+ quick set up
+ easy to read
+ significantly thinner than the previous models
+ unique design

CONs
– no solar

Feedback from Experts *based on comparison info with similar watches by price, model range, etc.

PROs
+ hourly Time Signal
+ carbon (Carbon Core Guard) / Resin material
+ 3 years battery

CONs
– no Auto-Back Light
– no Magnetic Resistance

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GA-2100 Model Range *may be updated

*You may find updated information about colors on our G-Shock 2021 New Releases page →

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The most distinctive specs of GA-2100 *Editorial
— 200-meter water resistance
(good for swimming but not for deep diving)
— Carbon Core Guard structure (protects the module by enclosing it in a carbon case. The case is made of fine resin embedded with carbon fibers for outstanding strength and crack resistance)

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Other G-Shock GA Watches *similar by price and functions but different by cases

These are not all G-Shock GA Series. Here is a list of All G-Shock GA Watches →


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Official GA-2100 Video

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Official Marketing Focus from Casio

Ever since the first DW-5000C went on sale back in 1983, G-SHOCK has continued to push the limits of timekeeping toughness while creating new and original designs. These new models embody these efforts in an attractively thin configuration.
These new models inherit the octagon form that was also employed for the original DW-5000C. Analog-digital timekeeping comes packed into a no-nonsense simple design without sacrificing G-SHOCK level toughness.
High-strength resin material, which is reinforced with carbon fibers, makes it possible to create a case that is a mere 11.8 mm thin, which is the thinnest among G-SHOCK combination models.


G-Shock GA-2100 on the wrist!

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Official GA-2100 Specs / Features *for base version GA-2100-1A1

  • Case / bezel material: Carbon / Resin 
  • Resin Band
  • Mineral Glass
  • Shock Resistant
  • Carbon Core Guard structure
  • 200-meter water resistance
  • Double LED light
    LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off
  • 1/100-second stopwatch
    Measuring capacity:
    00’00”00~59’59”99 (for the first 60 minutes)
    1:00’00”~23:59’59” (after 60 minutes)
    Measuring unit:
    1/100 second (for the first 60 minutes)
    1 second (after 60 minutes)
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
  • 5 daily alarms
  • Hourly time signal
  • Hand shift feature
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping
    Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
    Digital: Hour, minute, second, pm, month, date
  • Accuracy: ±15 seconds per month
  • Approx. battery life: 3 years on SR726W × 2
  • Size of case : 48.5×45.4×11.8mm
  • Total weight : 51g

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GA-2100 Comparison Table with similar G-Shock Watches

GA-2100

Price (Amazon)

Year of first Release

2019

2019

2019

Accuracy

±15 seconds per month

±15 seconds per month

±15 seconds per month

SmartWatch Features

No

No

No

Light

LED light

Neobrite (hands and hour markers) Double LED light

Neobrite (hands and hour markers) Double LED light

Alarm

5 daily alarms (with 1 snooze alarm)

5 daily alarms

5 daily alarms

Timer

Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Other: Auto-repeat

Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)

Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)

Stopwatch

1/1000-second stopwatch
Measuring capacity: 99:59'59.999''
Measuring modes: Elapsed time, lap time, split time
Others: Speed (0 to 1998 units/hour), Distance input (0.0 to 99.9)
Mach indicator (speed exceeding 1225 units/hour)

1/100-second stopwatch
Measuring capacity:
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times

1/100-second stopwatch
Measuring capacity:
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00''~23:59'59'' (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times

Hourly Time Signal

Yes

Yes

Yes

World Time

29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping

31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping

31 time zones (48 cities + coordinated universal time), daylight saving on/off

Auto-Back Light

Yes

No

No

Magnetic Resistance

Yes

No

No

Case / bezel material

Resin

Carbon (Carbon Core Guard) / Resin

Carbon (Carbon Core Guard) / Resin

Glass

Mineral Glass

Mineral Glass

Mineral Glass

Battery

2 years on CR1220

3 years on SR726W

3 years on SR726W

Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size

55×51.2×16.9

51.2×48.7×14.1

48.5×45.4×11.8


Full features (if you want to know more)

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GA-2100 Replacement Band (Strap) *availability
We think it is very important (before buying a new watch) to know if there will be some choice as for replacement bands for GA-2100 (in future or even now). So we made a research and you shouldn’t worry about your future as the bands are available for buying.

starting from 135$ on eBay →
starting from 48$ on PacParts →


Recent News about GA-2100 

All Casio GA-2100 News →


You ask, we answer…

What does 200-meter water resistance in GA-2100 mean?

The watch is good for swimming but not for deep diving.

What is Carbon Core Guard structure in GA-2100?

It protects the module by enclosing it in a carbon case. The case is made of fine resin embedded with carbon fibers for outstanding strength and crack resistance.

What model range does GA-2100 belong to?

STANDART ANA-DIGI (This Line includes Digital and Analog displays on G-Shocks that are the best in “price/quality” category. Usually have traditional digital functions, but with beautiful hands. Don’t worry, the hands won’t prevent you from seeing digits, since there is a special Hand Shift technology that moves them to the neutral position).


Not sure about GA-2100? There are more G-Shocks!

Back to All G-Shock Models →

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