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Casio

G-Shock X-Large GA100

  • Based on 1,290 reviews
Condition: New
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Availability: Only 3 left in stock, order soon!
Fulfilled by JEWEAR LLC
Arrives Sunday, Nov 30
Order within 22 hours and 7 minutes
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Features

  • Sport watch with red contrast, circular cutouts on hands, and logoed bezel
  • Also features speed timer, auto LED light, world time for 48 cities, daily alarm with snooze, countdown timer, stopwatch, 1/1000-second chronograph, day/date calendar
  • 51.2 mm resin case with mineral dial window
  • Quartz movement with display
  • Resin band with buckle closure
  • Water resistant to 200 m (660 ft): In general, suitable for professional marine activity and serious surface water sports, but not scuba diving

Item Package Dimensions L x W x H: ‎4.41 x 3.62 x 2.56 inches


Package Weight: ‎0.16 Kilograms


Item Dimensions LxWxH: ‎2.17 x 0.67 x 2.02 inches


Item Weight: ‎0.15 Pounds


Brand Name: ‎CASIO


Country of Origin: ‎United States


Model Name: ‎GA100-1A4


Color: ‎Black


Material: ‎resin


Suggested Users: ‎mens


Manufacturer: ‎Casio


Part Number: ‎GA100-1A4


Model Year: ‎2011


Style: ‎Modern


Size: ‎CASE 55MM


Sport Type: ‎marine activity, water sports


Water Resistance Depth: ‎660 Feet


Date First Available: March 15, 2005


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Great Watch
Color: Black
Watch was in perfect Condition and all features are working fine. Price and Quickness of Watch arriving Was Great!
Reviewed in the United States on May 15, 2025 by Chris
    • Excelent Watch
Color: Black
Review Image by Esaú Esaú
Review Image by Esaú Esaú
Review Image by Esaú Esaú
excellent seller, eating. Excelent Watch !!! 🤩🤩🤩
Reviewed in the United States on May 25, 2025 by Esaú Esaú
    • I really like it.
Color: Black
I have had three of the same Timex Ironman watches over the years. The big problem that I had was that first the loop for excess band length would break--- that was easily remedied by using an o-ring to replace it. Then within a couple of months of that the band would always break. I have tried to find a replacement band without luck. Unfortunately the band has a non straight end that keys into the watch body which more or less prevents using an aftermarket band of any type. Plus I wanted something different. So this time around (no pun intended!) I decided on finding a watch that I can get a band for and over the holidays I saw a G-Shock at a local store and it stuck in my mind. This is for a everyday watch that I wear and the functions that really matter are time and date--- the rest is just the proverbial "added bonus". So I could not decide between this one and the one that is all black--- so with free returns I bought both as well as one other to try out. The other was fine, but simply too small in diameter. Maybe when I was in my teens it would work, but as an adult--- just didn't look large enough. So I sat both this one with the red and the all black side by side. I kept using the functions and it really came down to reality--- I need to be able to see the face as easily as possible. So the all black that has all black lettering and the black inverted display on the digital part--- I know it will bother me over time and I will learn not to like it. So I decided to keep this one. I do like the red accents and the buttons are clearly labeled plus the display may not be as sexy as the other in black, but it is easier to see all the time. And as far as the red hour hand being hard to see--- for me it is not a problem. I have made a point of looking at it at different parts of the day--- it is always normal to read. Yes the hands do get in the way of the digital readout at specific times of the day, but for me it is not a big deal. Overall styling is great for a resin type watch and it feels good on my wrist. As far as size, it is almost exactly 2" from button to button on the diagonal and is about 1/2" thick. I thought it may have been too big, but it is just right. As far as price--- compared to some similar watches in the same range--- I will stick with the G-Shock. I have also ordered a spare band so that when it does eventually break--- I will have a spare ready to go. For setup I never even read the book. Took less than 1-minute to do and the longest part was scrolling through the time zones and then remembering if we are on DST or not. As far as the backlight it is amber and factory set for 1-second. After reading another review on the all black version--- in the adjustment menu there is the option to change it to 3-second which I did. Again, easy to do and happy with it! ... show more
Reviewed in the United States on February 28, 2015 by The Goat
    • A Rugged, Good-looking Watch
Color: Black
A rugged, good looking watch. But it’s G-Shock and so that’s to be expected. Was looking for something to sit big on my wrist and this 55mm case does the job. The black and red color scheme captures your attention without being too gaudy. Minus one star for that red-colored hour hand, though. It’s difficult to read, like other reviewers have said. Doesn’t illuminate very well in the dark, either. But you’re not getting all the bells and whistles at this price point. What you are getting, however, is well worth the investment overall. ... show more
Reviewed in the United States on January 21, 2024 by Jemaah Azzam
    • Recommended watch
Color: Black
Love it!!!
Reviewed in the United States on September 23, 2025 by Sat Galán Riveros
    • Good quality watch
Color: Black
Great fit, looks good and works really well.
Reviewed in the United States on January 15, 2025 by ELS
    • Se ve bien
Color: Black
Elegante
Reviewed in the United States on August 3, 2025 by Domit Marquez
    • Good watch, few problems
Color: Black
Pros: the watch is durable, functional,customizeable, has a relatively simple manual, has a neat auto-light function (not extremely useful, but cool nevertheless), and is very stylish. Cons: the ones you've heard before: weak backlight(can be fixed by holding your finger over top half of watch while backlight is on). I don't know if others have experienced this, but my watch came with the speedometer hand off by a hair (fixable by navigating to time/date mode and holding "forward", then adjusting the hands to their 12 o'clock positions with "forward", "reverse" and "mode" buttons. Another minor con is the fact that the speedometer is not, in fact a speedometer, but a calculator of distance/time based on previously entered data. If I had done a little more research, this would've been clear to me. Overall, I would definitely recommend this watch to a friend (and have done so before), I haven't spent a day without it on. ... show more
Reviewed in the United States on March 2, 2012 by soccersquared

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