Casio G-Shock GM-2100 — Metal-clad Octagon in Original Case

*GM-2100MF-5A – Updated February 2022 color! Buy it on Amazon!

Rating: 3.5 out of 5.
Size★★★★★
Weight★★
Functions★★★
Materials★★★★★
Battery Years★★★
Price★★★
How did we compose this rating? Enjoy our calculations →

GM-2100 Model Range *may be updated

*Want to be the first to know about new G-Shock Updates? Here we store all recent Monthly G-Shock Updates →

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GM-2100 Limited Editions *unique style, materials, and price

The Listing of All G-Shock GM-2100 Limited Watches → *with detailed description about the style


About the Watch in Short. Go sleek, sharp and bold with a G-SHOCK standard-bearer in a metal-clad octagonal take on the original iconic design.
Forged in stainless steel with rounded hairline finish, the strong bezel says super style all the way. The dial is treated with vapor deposition finish for a meticulously detailed metallic look that suits a classic metal G-SHOCK timepiece. Incremental variations in the detailed square dot texturing on the wristband take casual urethane materials up a notch.



General Information

Price$250
*average Amazon Price, we may earn commission from purchases
Year of first Release2021
Suitable for Wrist Size160 – 210 mm
Module Number 5611 / 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)
Other Divisions the GM-2100 belongs to: *you may find all watches of the division by clicking on the linkG-Shock Ana-Digi
G-Shock Carbon Core Guard
G-Shock 2021

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Enjoy Japanese Unique Features in GM-2100!

Evolving toughness, metal covered, impact resistant structure. The module is protected by a strong stainless steel bezel and an inner case made of glass fiber reinforced resin that is resistant to breakage and deformation. By providing a fine protrusion on the inner case and reducing the contact surface with the bezel, the impact from the outside is mitigated. The idea of ​​the hollow structure is applied with modern technology to create a shock-resistant structure with a metal exterior.

Octagonal form that inherits the symbol of toughness. The bezel uses an octagonal design motif that continues from the original GA-2100. Through time-consuming forging, cutting, and polishing, it is precisely molded from a complicated front surface shape to a back surface shape that perfects the fitting accuracy with the inner case. The top surface is beautifully finished with a circumferential hairline and the sides are mirror-polished.

Minimalistic beauty, slim design. By adopting a metal-covered impact-resistant structure, it clears the impact-resistant standard with the minimum required thickness. In addition, the module has been made thinner by optimising the board configuration and mounting at high density. A slim design with a clean fit is achieved despite the combination of metal case and analog digital.

Strap Styling – Stylish Textured Band.  The GM-2100 features a urethane band with a fine square dot texture, achieved
through advanced moulding technology. The band can be easily attached and
detached with the slide lever.

Discerning detail
Metallic vapor deposition dial. The surface of the dial is mirrored and hairlined to give a stunning level of attention
to detail and a glint that is bound to catch your eye.

Individual Style – Multiple Colours. In addition to the silver colour bezel (GM-2100), which emphasises the strength of the metal, dark blue IP (GM-2100N) and dark grey IP (GM-2100B) are used for stylish alternative bezel colours.

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Official GM-2100 Specs / Features *for base version GM-2100CH-1A

  • Case / bezel material: Resin / Stainless steel
  • Resin Band
  • Neobrite
  • Shock Resistant
  • Mineral Glass
  • Gray ion plated bezel
  • 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 : 49.3×44.4×11.8mm
  • Total weight : 72g

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G-Shock GM-2100 on the wrist!

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What we like in GM-2100 *comments by experts with 10 years experience in writing about Casio watches
Steel Casio Oak (popular octagonal bezel. Casio simply replaced the watch with a stainless steel bezel and case, making the watch more stylish and more weighty)
Carbon Core Guard Structure (protects the module with a carbon case. Highly durable carbon fiber-reinforced resin is added not only to the center case, but also to the front and side button guards, providing even stronger resistance to shocks from above or below, or from any side)
Stylish Look (for everyone for any style)
200-meter water resistance (good for swimming but not for deep diving)


G-Shock GM-2100 Display Guide *for key functions only. For you to know how it works))

Timekeeping

Use the Timekeeping Mode to set and view the current time and date.
– To view the Home City name (English), press A.

Checking the Current Time in a Different Time Zone

You can use the World Time Mode to view the current time in one of 31 time zones (48 cites) around the globe. The city that is currently selected in the World Time Mode is called the “World Time City”.

Using the Stopwatch

The stopwatch measures elapsed time, split times, and two finishes.
– The stopwatch measures elapsed time in units of 1/100 seconds for the first hour, and in 1-second units after that for up to 24 hours total. After that, elapsed time reverts to zero and then stops.

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GM-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
+ at this this rate they’re going to need their own watch case
+ the green realy nice look
+ the new watch dials are amazing

CONs
– no solar and no rc
– there’s a problem with legibility
– the lume is not good, no lume on index markers, reverse LC displays almost unreadable

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

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


Official Casio Description. Like other GM models (GM-5600GM-6900GM-110), the GM-2100 is based on its all-resin counterpart and has a stainless steel bezel. Considering the popularity of the GA-2100 series, a metal-covered “CasiOak” was inevitable, but we were not expecting to see it so soon.


GM-2100 Comparison Table with similar G-Shock Watches

GM-2100

Price (Amazon)

Year of first Release

2021

2019

Accuracy

±15 seconds per month

±15 seconds per month

SmartWatch Features

No

No

Light

Double LED light

Neobrite (hands and hour markers) Double LED light

Alarm

5 daily alarms

5 daily alarms

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)

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

1/100-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

World Time

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

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

Case / bezel material

Resin / Stainless steel

Carbon (Carbon Core Guard) / Resin

Glass

Mineral Glass

Mineral Glass

Battery

3 years on SR726W × 2

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

48.5 x 45.4 x 11.8

48.5×45.4×11.8


Full features (if you want to know more)

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Recent News about GM-2100 *on casiofanmag.com

  • G-SHOCK have always embraced the spirit of challenge in their untiring pursuit of the ultimate toughness. In 1983, when the resolve to build a watch that would never break produced the very first G-SHOCK — the DW-5000. Not much later, in 1989, the AW-500 arrived, offering the same shock resistance but as an analog […]
  • G-SHOCK returns with the Midnight Fog collection, introducing a series of timepieces in honed metal that evoke the soft essence of night fog. With the latest assortment, the brand has unveiled new iterations of the GM-2100MF, GM-5600MF and GM-110MF models, revamping the iconic octagonal face in a matte finish in various subdued shades that […]
  • From G-SHOCK, which pursues toughness and continues to evolve, MIDNIGHT FOG (midnight fog) is the theme color model. The base model is a thin octagonal GM-2100. The MIDNIGHT FOG series has a cool finish with a matte textured skeleton band on the color IP honed metal bezel. It is a casual and easy-to-style season […]

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

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