Search  for anything...
Casio

G-Shock X-Large GA100

  • Based on 1,289 reviews
Condition: New
Checking for the best price...
$85.19 Why this price?
Save $13.81 was $99.00

Buy Now, Pay Later

As low as $14.20 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Sunday, Mar 29
Order within 36 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

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

Display: Analog-Digital


Watch Movement Type: Quartz


Additional Features: Water Resistant


Power Source: Battery Powered


Strap Type: resin strap


Water Resistance Depth: 660 Feet


Sport Type: marine activity, water sports


Clasp Type: Buckle


Water Resistance Level: Waterproof


Embellishment Feature: Crystal


Closure Type: Buckle


Band Material Type: Resin


Case Material Type: Resin


Crystal: mineral


Case Diameter: 51.2 Millimeters


Band Width: 16 Millimeters


Case Thickness: 16.9 Millimeters


Warranty Type: Manufacturer


Style Name: Modern


Shape: Round


Band Color: Black


Dial Color: Black


Theme: Sports


Face Style: Modern


Brand Name: Casio


Model Name: GA100-1A4


Model Number: GA-100-1A4DR (G272)


Series Number: 100


Item Weight: 0.15 Pounds


Global Trade Identification Number: 24


Manufacturer: Casio


UPC: 079767443924


Manufacturer Part Number: GA100-1A4


Unit Count: 1.00 Count


Age Range Description: Adult


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 29

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

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • 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
    • 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
    • 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
    • Fantastic value...
Color: Black
After years of cheap knock offs and even a few Armitrons, all in the $20 to $35 range, I broke down and spent $85 on this genuine G-Shock... and I wish I had sooner. Pros: Very rugged Stylish Easy to read date and day Constantly displayed seconds timer Large, easy to use buttons Adjustments are easy and intuitive. No instructions necessary unlike my Citizen Blue Angels Eco-Drive that you need an engineering degree just to be able to follow the instructions Bright LED light Excellent, easy to adjust band Cons: Hour hand is a bit hard to see LED is an "across the face" light rather than a backlight and it only stays on for 1.5 seconds. The plastic case has "protection knobs" that partially cover the crystal, thus providing a place for dirt to collect The "crystal" seems to scratch a bit easier than I thought it would (or should) and I highly recommend a watch crystal protector A bit expensive when compared with other "rugged" watches but well worth the investment in the long run. ... show more
Reviewed in the United States on March 1, 2014 by Long Island Dad
    • Excelent Watch
Color: Black
Review Image by Esaú
Review Image by Esaú
Review Image by Esaú
excellent seller, eating. Excelent Watch !!! 🤩🤩🤩
Reviewed in the United States on May 25, 2025 by Esaú
    • It's a very good looking watch
Color: Black
I just received this watch. It's a very good looking watch. Like the GD100 model I own, it's light weight and very comfortable. The hands are very visible in the day time. I love the red and black combination. The back lighting at night could be improved. Holding your hand around the watch when the back light is on, improves the visibility of the hands at night. Forget viewing the digital screen at night. So far, from my short experience with G-Shock watches, they need to improve the back lighting of their Digi/Analog watches. Their digital watches have very good back lighting. Casio, why not use the same back lighting on the analog watches? They also need to make the alarm signal louder. Either that, or my hearing is beginning to go. If I need to see the time at night or in a theater, I'll wear my GD100 with the excellent blue back light, however during the day. there is no better looking watch than the GA100-1A4. ... show more
Reviewed in the United States on September 1, 2016 by Amazon Customer
    • Big, Sharp looking Watch
Color: Black
This is another great G-Shock. I'll admit the 55mm size scared me a bit and I had visions of walking around with a kitchen clock on my wrist but it looks fine on my average 7 inch wrist. The digital displays are very legible and integrate well with the analog dial. Casio did a great job with the design of this watch and it has some nice features. The mode stopwatch, timer & world time functions all work well. My only reservation is, well, it's such an impressive looking piece you kind of expect it to perform more tricks than it does & I think, unlike most G-Shock watches, this is kind of a style over function piece which I hope isn't the direction Casio plans to pursue. Anyway, if the watch appeals you should buy it and enjoy it. ... show more
Reviewed in the United States on June 19, 2015 by EcosseF1

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...