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The Casio G-Shock GM-2100C is a metal-clad, analog-digital G-Shock with a cloth band—not a full-metal watch. Casio lists a resin-and-stainless-steel case and bezel, a 49.3 × 44.4 × 11.8 mm case, 72 g weight, 200-metre water resistance, and approximately three years of battery life. Its appeal is the Utility Metal styling and everyday timing functions; comfort, wet-band behavior, and real-world wear require firsthand testing.
What is the G-Shock GM-2100C?
The GM-2100C pairs the octagonal GM-2100 design with a casual cloth band. Casio describes the Utility Metal collection as a utilitarian style. The manufacturer’s positioning is not evidence of tested comfort or outdoor performance.
The published specifications below are from Casio Canada and are manufacturer specifications, not independent measurements.
| Specification | Casio listing |
|---|---|
| Case size | 49.3 × 44.4 × 11.8 mm |
| Weight | 72 g |
| Case and bezel materials | Resin and stainless steel |
| Band | Cloth |
| Glass | Mineral |
| Compatible band size | 145–215 mm |
| Resistance | Shock resistant; 200-metre water resistance |
| Battery | Two SR726W cells; approximately three years |
These specifications describe a metal-clad construction, not a full-metal case. The published dimensions and weight can help you judge the watch on paper, but they do not establish how it will fit or feel on your wrist.
#1 Best Overall
- I was upset when my watch’s band holder broke because I wasn't using my sport watch for long time.Sometimes i didn't want to buy whole new watch band,This kit watch band keeper is a great replacement
- We provide multiple sizes watch strap holder if you aren't sure what size you need. You will receive Six different sizes sturdy, black watch band loops with internal dimensions of 16mm/18mm/20mm/22mm/24mm/26mm
- Are you worried strap retaining rings comes out of the band on occasion ？--Our Bands Keeper Fastener Rings design is Anti-slip. Rubber stop was easy to install. They stretch over existing clasps .Prevent loosening and constraining extra length. Not easy to fall off
- Our replacement watch band comes in a sturdy, clear storage box that opens easily and closes securely.You no longer have to worry about losing the watch band strap loop
- The strap retainer rings is flexible and strong,making it easy to attach to the watch wristband and fits most watches. Whether it's diving or sports，Black is not only stylish,but also works well with various colors of straps
Functions and display
Casio lists an analog-digital display and practical timekeeping functions. The listed functions include:
- World time across 31 time zones and 48 cities, plus UTC, with daylight-saving time on/off.
- A 1/100-second stopwatch for the first 60 minutes, then one-second measurement.
- A countdown timer with a maximum range of 24 hours.
- Five daily alarms.
- Double LED illumination, with a selectable 1.5- or 3-second duration.
- A full auto calendar and a hand-shift feature that temporarily moves the hands when they obstruct the LCD.
The product is presented in the cited Casio listings as a conventional watch with timing functions, not as a connected smartwatch. The sources do not support claims about phone synchronization or other connected features.
Rank #2
- You will receive 10pcs black watch strap holder loops
- Compatible with 22mm strap/ watch band
- Made of high quality silicone rubber, skin-friendly. Comfortable and Durable
- Just slide the watch strap through the fastener rings before wear to fix the strap. Easy to install and remove
- Measure the width of your strap in millimeters with a ruler and add 1mm. Suitable for most sports watches
Size, band, and real-world wear
At 49.3 × 44.4 × 11.8 mm and 72 g, the listed dimensions and weight are useful starting points when considering fit. They cannot tell you whether the watch will feel comfortable or sit securely on your wrist.
The cloth band is a defining part of the model, but the cited specifications do not establish how it feels, adjusts in practice, behaves when wet, or holds up over time. Those judgments need disclosed hands-on testing or independent owner evidence. Casio Japan lists replacement-band options, but confirm compatibility and local availability for the exact regional model before purchasing one.
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- PACKAGE CONTENTS - You will receive 6 black strap retaining rings with internal dimensions of 18mm/20mm/22mm. Black is not only stylish,but also works well with various colors of straps.
- PREMIUM MATERIAL - The strap rings is made of silicone,a soft rubber-like silicone. It is soft,lightweight,comfortable and withstands friction well. They are durable and can be used for a long time.
- HOW TO CHOOSE SIZE - To better match your watch,measure the width of your strap in millimeters with a ruler and add 1mm. Follow this method to order the perfect size. Suitable for most sports watches.
- EASY TO USE - The strap retainer rings is flexible and strong,making it easy to attach to the watch wristband. Simply stretch/slide it onto the clasp. It only takes a second to change.
- WIDE COMPATIBILITY - The strap retainer rings replacement accessory fits most wristbands or smartwatches. The high quality rubber strap ring holds the end of the strap in place and the classic black strap gives your watch a stylish look.
Water resistance and care
Casio lists shock resistance and 200-metre water resistance. These are manufacturer ratings; follow Casio’s operating and care guidance rather than treating the rating as a guarantee for every activity or condition. The available sources do not establish how quickly the cloth band dries or how it performs after repeated exposure to water.
Regional availability and price
Model suffixes, availability, and prices vary by market. Casio Japan records a February 2023 launch and a suggested Japanese retail price of ¥28,600 including tax for the GM-2100C-5AJF, and marks that listing discontinued. This is historical, Japan-specific information; it does not establish current availability elsewhere. Casio Canada displays a buy pathway for the GM-2100C-5A, but that does not confirm stock in your location.
Rank #4
- Flexible and Comfortable: Made of tightly weave nylon fabric, this watch strap is soft, breathable, lightweight, washable and quick drying, paired with a sturdy brushed stainless steel buckle, suitable for various occasions
- Sturdy and Durable: The double-layer nylon is sewn, and the neat stitching enhances its aesthetic appeal and makes the strap more durable. The strap features laser cut holes to resist fraying and won't scratch your skin
- Easy to Change: The quick release springs make it a breeze to install on your watch, no tools required
- Applicable Wrist Length: The strap length is 75mm+125mm, thickness: 2.2mm, suitable for wrists ranging from 15.5cm to 20cm (6”-8”)
- Size Selection: Compatible with traditional or smart watches with standard lug width of 18mm, 19mm, 20mm and 22mm. Please accurately measure your watch lug width before ordering. Size=Watch Lug Width
Before buying, check current local retailer stock and confirm the exact suffix. The researched sources do not verify a current universal price or a specific alternative model that can be recommended as superior.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who is the GM-2100C for?
The GM-2100C is worth considering if you want a GM-2100 design with a cloth band and metal-clad appearance, and its listed dimensions and functions suit your needs. Decide whether the band and case fit your preferences through an in-person try-on or reliable firsthand evidence. Do not choose it on an assumption that the cloth band is comfortable, dries quickly, or offers a particular durability advantage unless you have evidence for that claim.
Best Value
- You will receive 10pcs black watch strap holder loops
- Compatible with 20mm strap/ watch band
- Made of high quality silicone rubber, skin-friendly. Comfortable and Durable
- Just slide the watch strap through the fastener rings before wear to fix the strap. Easy to install and remove
- Measure the width of your strap in millimeters with a ruler and add 1mm. Suitable for most sports watches
FAQ
Is the Casio G-Shock GM-2100C full metal?
No. Casio lists resin and stainless steel for the case and bezel. The GM-2100C is metal-clad, not a full-metal watch.
How big and heavy is the GM-2100C?
Casio lists dimensions of 49.3 × 44.4 × 11.8 mm and a weight of 72 g. These manufacturer specifications do not determine how the watch will fit or feel on an individual wrist.
How long does the GM-2100C battery last?
Casio estimates approximately three years from two SR726W cells. This is a manufacturer estimate, not an independently verified result.
What functions does the GM-2100C have?
Casio lists world time, a stopwatch, a countdown timer, five daily alarms, double LED illumination, a full auto calendar, and a hand-shift feature.
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Availability and suffixes are market-specific. Casio Japan marks its GM-2100C-5AJF listing discontinued, while Casio Canada has a buy pathway for the GM-2100C-5A. Check local stock and the exact model suffix.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
