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Casio

Casio G-Shock GA100-1A1 | Men's Tough Analog-Digital Watch | 200M Water Resistant | Shock & Magnetic Resistant | Sporty & Rugged Design

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Arrives Friday, Feb 6
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Description

G-SHOCK GA100-1A1: The Ultimate Tough & Tactical Watch Designed for those who demand extreme durability and precision, the G-SHOCK GA100-1A1 is a rugged yet stylish timepiece that combines analog and digital displays for maximum functionality. Built with shock resistance, magnetic resistance, and 200-meter water resistance, this watch is engineered for military, athletes, outdoor adventurers, and extreme sports enthusiasts. The matte black resin case and band provide a stealthy, tactical look, while the oversized face and high- contrast digital-analog layout ensure easy readability. Whether you're timing a workout, tracking speed, or setting alarms, the GA100-1A1 delivers reliable performance in any environment. Equipped with a 1/1000-second stopwatch, speed indicator, and countdown timer, this G-SHOCK is perfect for training and competition. The LED backlight with afterglow ensures visibility in the dark, while five daily alarms and world time settings keep you on track across time zones. With its bold design, legendary toughness, and versatile functionality, the GA100-1A1 is not just a watch—it’s a statement of strength and endurance.

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1 x 1 x 1 inches; 2.5 ounces


Item model number ‏ : ‎ GA-100-1A1DR (G270)


Department ‏ : ‎ mens


Batteries ‏ : ‎ 1 Lithium Metal batteries required. (included)


Date First Available ‏ : ‎ March 16, 2010


Manufacturer ‏ : ‎ Casio


Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.:


Best Sellers Rank: #54,135 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #134 in Men's Wrist Watches


Brand, Seller, or Collection Name: Casio


Model number: GA-100-1A1DR (G270)


Part Number: GA100-1A1


Model Year: 2018


Item Shape: Round


Dial window material type: Mineral Glass


Display Type: Analog-Digital


Clasp: Buckle


Case material: Resin


Case diameter: 5.1 centimeters


Case Thickness: 16.9 millimeters


Band Material: Resin


Band size: Mens Standard


Band width: 21 millimeters


Band Color: Black


Dial color: Black


Bezel material: Resin


Bezel function: Stationary


Calendar: Day-Month


Special features: Timer, Stopwatch, Alarm


Item weight: 2.5 ounces


Movement: Japanese Quartz


Water resistant depth: 200 Meters


Warranty: Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Feb 6

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Top Amazon Reviews

    • Outstanding watch!
Review Image by Brian Brian
Quick shipping. Great packaging. I have worn this watch everyday after it arrived. It is light weight, looks great and lets me see the time. I would recommend. Other notes, It is not too large as I was a little worried about that. It is durable as I already dropped it and banged it again stuff and did not leave a mark. I am super happy with this purchase. ... show more
Reviewed in the United States on May 28, 2024 by Brian Brian
    • Excellent watch for military Physical Training
There has been quite a few discussions on here regarding the quality of this watch and a line down the middle regarding the lighting of the watch's display and a very small portion of folks indicating that the time was never correct on the watch. To address the point almost half the reviews being made about the lighting, the watch display is lit by a single "amber" colored LED (to save power and provide a low light profile, I imagine) which provides more than adequate lighting for the analog hands on the watch to be viewed in pitch black darkness. The watch has a configuration option which allows you to modify the amount of time the LED light stays on from 1.5 to 3.0 seconds. The default time was sufficient for me to view the time but others may find the additional time convenient. This additional time may be what supplements the ability to view the digital time easier. Another owner of this watch indicated that placing an finger across the watch face from 9 to 3 (across the horizontal horizon) allows for the illumination to better reflect back onto the digital display for easier reading. I concur with this assessment and was able to read the time with both the 1.5 and 3.0 second configuration. This is not to say that the time on the digital display is what I would personally be using in low light conditions but it is definitely possible. Finally, the last point to discuss is the settings of the watch and the provided instruction manual in the packaging. Some have complained that the instructions are far too exhaustive due to the instruction manual being of significant length. To these people I say, "Did you even try cycling through the pages?" The instructions that came with my watch came with at least 4-6 different languages so that others that do not read english could take advantage of this product. The english instructions were probably about 40 pages to include the table of contents and some "Care Instructions". I was able to configure the analogue portion of the watch and the world time (to include modifying the Daylight Savings Time setting) in roughly 5-10 minutes at the most. Those that were unable to properly set this watch either did not focus on the various time zones that are clearly identified in the manual, or did not properly configure the Daylight Savings Time option for their time zone. I can say with great confidence that this watch will more than likely be used very much for work, play and the military and hope that it serves me for a long time because it is a great looking watch. Additionally, for those concerned about the size of the watch, it does have a good size in circumference and height off the wrist, but nothing out of the ordinary such as watches from Invicta dive watches. The weight of the watch is very light for me but I am accustomed to watches made of steel with a steel band and that may be causing me to think the watch is light in weight. Hopefully this conveys a very descriptive point of view regarding this watch and points out the supposed "flaws" others have portrayed in their reviews. ... show more
Reviewed in the United States on September 9, 2014 by Rogelio Fiorenzano
    • An amazing watch for an amazing price.
If you need a watch that can perform well in outside conditions as well as look sharp in your Sundays best, then this watch is perfect for you. The watch has several pros to out way the few cons. Here is a list of each in which I will go into further detail below. Pros: 1 - Relatively inexpensive. 2 - Slick comfortable design. 3 - Easy to read watch face. 4 - Easy to use functions. 5 - wrist band extends to almost any wrist size. Cons: 1 - Daunting manual. 2 - A bit mushy buttons 3 - Weird luminescence feature. Now in nor depth: PROS: 1 - For the features that this watch offers along with a wonderful warranty and a slick design its very hard to argue that you overpaid for this watch. 2 - the black color of the watch is a very wonderful shade that doesn't detract from any attire. As well as the white clock hands and reflective light grey details on the watch face. Additionally the watch is overall very comfortable. 3 - with the dual analog and digital watch face you can easily read what time it is (however as with all digital and analog watches if you rely on the digital the panels can sometimes get blocked by the watch hands) 4 - the watch has a variety of functions from timer to alarms (4 alarms total) to stopwatch functions. Everything you would expect from a digital watch. 5 - this one is pretty self explanatory CONS: 1 - This one threw me off guard. The watch does have a great deal of functions but because of that, the manual (which is pretty small but very thick) has to pack a great deal of info in a small space. With small text it may be daunting at first but then is easy to follow after learning the format. 2 - the buttons sometimes feel a bit too mushy for me. 3 - the luminescence function is just a small led at the bottom of the watch face. It is good when reading the watch hands but doesn't help at all to read the digital panels. In summary this watch has a great deal to offer (there is a lot I left out to save typing) for the cons that are there. I will leave a five star review because the cons rarely come into play in my situation. So if you are looking for a inexpensive, durable, and slick watch this one is a great choice for you. I hope my review is helpful to anyone looking into this watch. Best regards - David C ... show more
Reviewed in the United States on March 27, 2016 by David Chapman

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