

⏳ Stay sharp, stay ahead — the G-Shock GA-2100-1A2ER is timekeeping redefined.
The Casio G-Shock GA-2100-1A2ER is a lightweight, durable quartz watch featuring a blue resin case and plastic strap. It offers a dual analogue-digital display, powered by a long-lasting lithium battery, and boasts a 200-metre water resistance rating suitable for swimming and diving. Designed for versatile wear from office to outdoor activities, this model combines precision, style, and rugged functionality in one iconic timepiece.
| ASIN | B09T6P2SS4 |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | 45,616 in Fashion ( See Top 100 in Fashion ) 229 in Men's Wrist Watches |
| Country of origin | China |
| Customer reviews | 4.3 4.3 out of 5 stars (1,037) |
| Date First Available | 23 Feb. 2022 |
| Department | Men's |
| Is discontinued by manufacturer | No |
| Item model number | GA-2100-1A2ER |
| Manufacturer | Casio |
W**S
Durable Watch with a good look
I like watches, and have bought quite a few over the years. I got this watch as something to wear in work. It is not bulky so you don't get bothered by it on your wrist ever. You can wear it with many different outfits and it works. I prefer watches with hands over pure digital so I really liked that aspect of this watch. Just a nice practical watch overall, does what its supposed to. Tells the time.
A**R
lovely looking watch
lovely watch not too chunky. nice dial easy to use.
L**E
Looks more expensive than it is
Love this watch. It’s my new every day piece looks good with everything and in every situation. Nice and easy to use.
H**D
Learning curve to setup
Really nice watch, but you have to take the time to learn how the four buttons are used to set date, time, day of week, daylight saving, time zone etc. Watch the YouTube videos, download the user and operational guides from the Casio web site the teeny tiny manual in the box is almost unreadable. Once you’ve done all that it tells the time, I don’t really need the alarm or stopwatch functions ;-)
S**E
G shock watch
Grand son loved it. It lights up beautifully
A**R
Casio Watch
Great product ! Solid and fancy, very happy.
B**S
You will not get this next day!!!!!
Do not believe that this comes next day with Amazon Prime.... Lies The watch itself is lovely.
A**H
Instruction manual needs to be improved
Setting up of time not easy to follow in instruction manual -this needs to be reviewed. The dial and hands and digital time mode on the blue model is not easy to read . This is the third G shock I have purchased both have run out of batteries after about three years and to replace they recommend you take to Casio dealer. Have tried and failed to replace my self but not easy. Once sorted its a good watch.
D**T
Article acheté pour une connaissance, pas eu de retour négatif, donc tout va bien!🤣🤣🤣🤣🤣
S**Y
This watch is perfect for me at work. I'm a tradesperson and it is tough enough to withstand everything I put it through on a daily basis.
R**A
nice to watch
M**6
CASIO G-SHOCK, JAK ZWYKLE WYSOKA JAKOŚĆ I DODATKOWO W REWELACYJNEJ CENIE. JEDYNY PROBLEM Z ZEGARKAMI CASIO TO TAKI, ŻE JAK KUPISZ JEDEN, TO CHCESZ ICH WIĘCEJ !!!
R**A
Muy bonito,lo único que la zona de reloj analógico no se ve si no prendes la iluminación debiera de verse de día sin prender como toda la vida
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