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🕶️ Own time, own style — the G-Shock GA-2100 is your ultimate everyday armor.
The Casio G-Shock GA-2100-1A4ER is a 45mm analog-digital quartz watch featuring a shock-resistant resin case with carbon core, mineral glass, and a black dial with luminous orange hands. It offers stopwatch, countdown timer, alarm, world time (29 zones), day-date calendar, and LED illumination. Water resistant to 200 meters, it’s powered by a 3-year lithium battery and secured with a durable plastic strap and buckle clasp. Lightweight at 51g, it’s designed for professionals who demand style, precision, and resilience.
| ASIN | B09T6QZCS3 |
| ASIN | B09T6QZCS3 |
| Age Range Description | Adult |
| Band Colour | Black |
| Band Length | 25 Centimetres |
| Band Material Type | Plastic |
| Band Width | 25 Millimetres |
| Bands | 1 |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | 61,992 in Fashion ( See Top 100 in Fashion ) 325 in Men's Wrist Watches |
| Brand Name | Casio |
| Case Diameter | 45 Millimetres |
| Case Material Type | Resin |
| Case Thickness | 11 Millimetres |
| Character | No aplica |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Country Of Origin | China |
| Country of origin | China |
| Crystal | Mineral Glass |
| Customer Reviews | 4.4 4.4 out of 5 stars (812) |
| Customer reviews | 4.4 4.4 out of 5 stars (812) |
| Date First Available | 23 Feb. 2022 |
| Department | Men's |
| Dial Color | Black |
| Display | Analog |
| Embellishment Feature | Crystal |
| Face Style | Digital Black |
| Included Components | Camera Body |
| Is discontinued by manufacturer | No |
| Item Shape | Round |
| Item Type Name | Watch |
| Item Weight | 51 Grams |
| Item model number | GA-2100-1A4ER |
| Manufacturer | Casio |
| Manufacturer | Casio |
| Manufacturer Part Number | GA-2100-1A4ER |
| Model Name | GA-2100-1A4ER |
| Model Number | GA-2100-1A4ER |
| Pattern | Solid |
| Power Source | Battery Powered |
| Product Dimensions | 40 x 47 x 23 cm; 51 g |
| Series Number | 2100 |
| Special Features | Alarm, Countdown, Light, Stop Watch, World Time |
| Sport Type | Swimming |
| Strap Type | Plastic |
| Style Name | GA-2100-1A4ER-AMZUK |
| Theme | Sports |
| Unit Count | 1 Count |
| Warranty Type | Limited |
| Watch Movement Type | Quartz |
| Water Resistance Depth | 200 Metres |
| Water Resistance Level | Waterproof |
J**M
Great watch
It’s a great watch god value
C**E
Lovely watch, definitely value for money and nice clear face.
Every thing I would expect from a g shock with the added bonus of an analogue face, just what I wanted.
A**R
Good first watch
Bought for my 11 Yr old, seems pretty rugged. The settings are pretty easy to use. No complaints from them so far. I like the combination of analogue and digital. Have to see how long the battery lasts
G**.
Really lovely and good for the price
So nice my partner so loved it
J**F
Just the job
I like it and that's why it's got 5 stars from me. If you like G-Shocks then you know what you want otherwise don't buy one as it's really just a watch! Tough as nails and keeps working all day, unlike me..
C**S
Horrible dark watch
Casio make a lot of G-Shocks including this one Ga-2100. Mostly known as the Casioaks (don’t know why), they have a good reputation for 200m water resistance, stopwatch, countdown timer, world clock and an incredible backlight. This one however is too dark to really see the digital display because it’s what they call a negative display. Why did I buy it? So I could strip out the insides and put a decent movement inside. The Casio AQ-S800 which is a better watch because it’s solar powered and you can see the face too.
Z**A
Great watch
For a G Shock it's a slim watch and looks good. The red is not as bright as it looks in the pictures. Same old Casio g shock rigmarole to set the time. That can be annoying to a new user. To be quite honest the digital read out is useless because of the size. The packaging is a cardboard box not the tin of old. All in all it's a decent casioaks watch.
L**G
Fake.
Fake watch.
J**O
Rien a redire, sa réputation la précède. Donne l'heure et le jour et plusieurs fonctionnalités. Très résistante, 8 mois d'utilisation intensive et pas une égratignure. Le seul defaut serait les réglages, pas très intuitifs, et qui nécessitent le manuel d'utilisation. Le prix est clairement justifié, et rapport qualité prix excellent.
E**.
I believe that this model is discontinued in North America. You may be able to find a style that you like at a retailer and if you want it, I suggest you buy it. Amazon delivery was exactly as expected. Watch is very beautiful with a blacked out dial with red accents. If you like a digital display, this watch is not for you. The digital display is very small. Very light and comfortable to wear with not having a bulky G Shock. You won’t break the bank to purchase this watch, so it is a great everyday beater or vacation watch.
A**A
The quality of this watch for its price has no comparison to any other in my collection. A must have!
A**V
Ich war schon seit Schulzeiten Fan von Casio-Uhr und nachdem meine letzte 2 Uhren wegen Alter (8-10 Jahre) kaputt gegangen sind, habe ich mich auf die Suche wieder nach Casio Uhren gesetzt. Casio G-Shock war eine von den Varianten und die schwarz-orange Version fand ich richtig schön und minimalistisch. Nach dem Erhalt muss man 5 Minuten widmen und die Uhr einrichten (am besten ein Youtube-Tutorial anschauen) da wird es genau erklärt wie und was man da klicken muss. Bin zufrieden
J**O
El mejor reloj q puedan comprar
Trustpilot
3 days ago
2 months ago