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Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch
Casio GA100-1A2 G-Shock Mens Watch

Casio GA100-1A2 G-Shock Mens Watch

Introducing a collection of new G-SHOCK models whose 35mm diameter faces and large cases give them a look of power and strength. Dial rings and raised hour markers create three-dimensional depth that gives the face plenty of character. The popular G-SHOCK three-dial face design incorporates one analog dial in the center, with digital dials on either side. These watches are designed and engineered to deliver outstanding shock resistance and water resistance, as well as anti-magnetism. Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure. 1/1000-second stopwatch, velocity indicator, World Time, 5 alarms and much more provides these models with unmatched function and performance.

Introducing a collection of new G-SHOCK models whose 35mm diameter faces and large cases give them a look of power and strength. Dial rings and raised hour markers create three-dimensional depth that gives the face plenty of character. The popular G-SHOCK three-dial face design incorporates one analog dial in the center, with digital dials on either side. These watches are designed and engineered to deliver outstanding shock resistance and water resistance, as well as anti-magnetism. Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure. 1/1000-second stopwatch, velocity indicator, World Time, 5 alarms and much more provides these models with unmatched function and performance.

Casio GA100-1A2 G-Shock Mens Watch

Introducing a collection of new G-SHOCK models whose 35mm diameter faces and large cases give them a look of power and strength. Dial rings and raised hour markers create three-dimensional depth that gives the face plenty of character. The popular G-SHOCK three-dial face design incorporates one analog dial in the center, with digital dials on either side. These watches are designed and engineered to deliver outstanding shock resistance and water resistance, as well as anti-magnetism. Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure. 1/1000-second stopwatch, velocity indicator, World Time, 5 alarms and much more provides these models with unmatched function and performance.

Introducing a collection of new G-SHOCK models whose 35mm diameter faces and large cases give them a look of power and strength. Dial rings and raised hour markers create three-dimensional depth that gives the face plenty of character. The popular G-SHOCK three-dial face design incorporates one analog dial in the center, with digital dials on either side. These watches are designed and engineered to deliver outstanding shock resistance and water resistance, as well as anti-magnetism. Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure. 1/1000-second stopwatch, velocity indicator, World Time, 5 alarms and much more provides these models with unmatched function and performance.

Price comparison

Price data powered by pricesAPI.io

Last updated at 06/22/2026 20:56:38

Amazon.com.au

$154.95

G-SHOCK Men's GA100 Analog-Digital Watch

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Amazon.com.au

$159.98

G-Shock Digital & Analogue Watch GA100-1A2 / GA-100-1A2

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$79.89

Casio G-shock Analogue/digital Mens Black/blue Xl Watch Ga100-1a2

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$149.33

Casio G-shock Ga-100-1a2 Watch | Ga-100 Series

Delivery $70.74

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$184.71

Casio G-shock Black Blue Analog Digital Watch Ga100-1a2 Japan Inport

Delivery $78.60

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$194.20

Casio G-shock Watch Ga-100-1a2 Black From Japan

Delivery $31.44

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$194.20

Casio Watch G-shock Ga-100-1a2 Black From Japan

Delivery $31.44

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$198.63

Casio G-shock Ga-100-1a2 Watch (overseas Model) [parallel Import]

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$243.32

Casio G-shock Ga-100-1a2dr Analog-digital Watch

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$506.82

G shock watch GA - 110 - 1 ADR (genuine brand)

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

Price history

Reviews

9 May 2021fatima a.r

originally posted on influenster.com

I was a little concerned when purchasing this watch. I didn't want something that was dainty, nor did I want a watch that easily collected every smudge and piece of dirt possible, as well as the notorious back light issues. When I got my watch it was packaged very well and the color is beautiful. The watch face isn't difficult to read, even in the dark, at least for me. I am a little harder on my watches and this has performed really well. The few smudges I have accumulated wiped right off. The only challenge I had was setting the time - it took a little bit to understand, as the manual isn't the most helpful with this task. Luckily, Youtube solved my dilemma and I was able to get it set. I particularly love the face color of this watch, the actual main reason I ... MoreI was a little concerned when purchasing this watch. I didn't want something that was dainty, nor did I want a watch that easily collected every smudge and piece of dirt possible, as well as the notorious back light issues. When I got my watch it was packaged very well and the color is beautiful. The watch face isn't difficult to read, even in the dark, at least for me. I am a little harder on my watches and this has performed really well. The few smudges I have accumulated wiped right off. The only challenge I had was setting the time - it took a little bit to understand, as the manual isn't the most helpful with this task. Luckily, Youtube solved my dilemma and I was able to get it set. I particularly love the face color of this watch, the actual main reason I bought it.

A decent and robust watch
18 June 2019

originally posted on watches.com

My second GA100 (previous one was the 1A4, red and black). Comfortable on the wrist, with a unique color. Three stars because of two reasons, both related to lighting: lack of legibility in any lighting other than bright, and the terrible front-lit display lighting.1. If you're indoors, you'd better have excellent eyesight if you intend on seeing the LCD display - it's reversed from traditional LCDs, so the characters and numerals are quite difficult to see. Easy to discern details in bright daylight though.2. Without a backlight, the information on the LCD cannot be read at night. The light provided is front-lit, at the bottom of the dial, so you are only able to make out the position of the analog hands. There is no lume on this dial face.The main benefit of ... MoreMy second GA100 (previous one was the 1A4, red and black). Comfortable on the wrist, with a unique color. Three stars because of two reasons, both related to lighting: lack of legibility in any lighting other than bright, and the terrible front-lit display lighting.1. If you're indoors, you'd better have excellent eyesight if you intend on seeing the LCD display - it's reversed from traditional LCDs, so the characters and numerals are quite difficult to see. Easy to discern details in bright daylight though.2. Without a backlight, the information on the LCD cannot be read at night. The light provided is front-lit, at the bottom of the dial, so you are only able to make out the position of the analog hands. There is no lume on this dial face.The main benefit of this one over the GA100-1A4 is that both the hour and minute hands are visible under front-lighting because they're painted white; it isn't possible to see the hour hand on the 1A4 using the amber LED because the hand is red - it just disappears.

Affordable Lifestyle Watch
8 March 2023messa_5003

originally posted on ebay.com

This G-Shock watch represents good value. The functions in it are all that one requires 99% of the time. It is both functional and can take some hard lifestyles. All black version is stealthy and the coloured options look cool. The included setup manual is very basic, but there is excellent help online for this model. I can fully recommend this G-Shock watch and I dont think you will be disappointed.

Specification

Parts NumberGA-100-1A2 , GA 100 1A2
ColorwayBlack/Blue
Upper MaterialFabric
Toe TypeRound Toe
Heel TypeFlat heel

Price comparison

Updated 3 days ago
Amazon.com.au

$154.95

G-SHOCK Men's GA100 Analog-Digital Watch

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Amazon.com.au

$159.98

G-Shock Digital & Analogue Watch GA100-1A2 / GA-100-1A2

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$79.89

Casio G-shock Analogue/digital Mens Black/blue Xl Watch Ga100-1a2

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$149.33

Casio G-shock Ga-100-1a2 Watch | Ga-100 Series

Delivery $70.74

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$184.71

Casio G-shock Black Blue Analog Digital Watch Ga100-1a2 Japan Inport

Delivery $78.60

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

Price history

Reviews

9 May 2021

I was a little concerned when purchasing this watch. I didn't want something that was dainty, nor did I want a watch that easily collected every smudge and piece of dirt possible, as well as the notorious back light issues. When I got my watch it was packaged very well and the color is beautiful. The watch face isn't difficult to read, even in the dark, at least for me. I am a little harder on my watches and this has performed really well. The few smudges I have accumulated wiped right off. The only challenge I had was setting the time - it took a little bit to understand, as the manual isn't the most helpful with this task. Luckily, Youtube solved my dilemma and I was able to get it set. I particularly love the face color of this watch, the actual main reason I ... MoreI was a little concerned when purchasing this watch. I didn't want something that was dainty, nor did I want a watch that easily collected every smudge and piece of dirt possible, as well as the notorious back light issues. When I got my watch it was packaged very well and the color is beautiful. The watch face isn't difficult to read, even in the dark, at least for me. I am a little harder on my watches and this has performed really well. The few smudges I have accumulated wiped right off. The only challenge I had was setting the time - it took a little bit to understand, as the manual isn't the most helpful with this task. Luckily, Youtube solved my dilemma and I was able to get it set. I particularly love the face color of this watch, the actual main reason I bought it.

fatima a.r originally posted on influenster.com
A decent and robust watch
18 June 2019

My second GA100 (previous one was the 1A4, red and black). Comfortable on the wrist, with a unique color. Three stars because of two reasons, both related to lighting: lack of legibility in any lighting other than bright, and the terrible front-lit display lighting.1. If you're indoors, you'd better have excellent eyesight if you intend on seeing the LCD display - it's reversed from traditional LCDs, so the characters and numerals are quite difficult to see. Easy to discern details in bright daylight though.2. Without a backlight, the information on the LCD cannot be read at night. The light provided is front-lit, at the bottom of the dial, so you are only able to make out the position of the analog hands. There is no lume on this dial face.The main benefit of ... MoreMy second GA100 (previous one was the 1A4, red and black). Comfortable on the wrist, with a unique color. Three stars because of two reasons, both related to lighting: lack of legibility in any lighting other than bright, and the terrible front-lit display lighting.1. If you're indoors, you'd better have excellent eyesight if you intend on seeing the LCD display - it's reversed from traditional LCDs, so the characters and numerals are quite difficult to see. Easy to discern details in bright daylight though.2. Without a backlight, the information on the LCD cannot be read at night. The light provided is front-lit, at the bottom of the dial, so you are only able to make out the position of the analog hands. There is no lume on this dial face.The main benefit of this one over the GA100-1A4 is that both the hour and minute hands are visible under front-lighting because they're painted white; it isn't possible to see the hour hand on the 1A4 using the amber LED because the hand is red - it just disappears.

originally posted on watches.com
Affordable Lifestyle Watch
8 March 2023

This G-Shock watch represents good value. The functions in it are all that one requires 99% of the time. It is both functional and can take some hard lifestyles. All black version is stealthy and the coloured options look cool. The included setup manual is very basic, but there is excellent help online for this model. I can fully recommend this G-Shock watch and I dont think you will be disappointed.

messa_5003 originally posted on ebay.com
Best G-shock
12 May 2021

This model is the best among g-shock . EL light with tough solar complete the model. Not so big not so small perfect shape . G switch is the best , dont have to look for tiny switch in the right corner so auto light can be turned off for battery efficiency. There are other gshock can offer more features but have to compromise EL light or the size of the watch . To me these features are important so this model is good with the marked price . One more thing not to mention is the multiband , this model doesnt have that and it ok for me as I adjust with atomic watch from internet and trust me in years it wont change the time for a second. But still if it matters to some, you can check the correct time by internet once in every 3months . But if you prefer to pay extra ... MoreThis model is the best among g-shock . EL light with tough solar complete the model. Not so big not so small perfect shape . G switch is the best , dont have to look for tiny switch in the right corner so auto light can be turned off for battery efficiency. There are other gshock can offer more features but have to compromise EL light or the size of the watch . To me these features are important so this model is good with the marked price . One more thing not to mention is the multiband , this model doesnt have that and it ok for me as I adjust with atomic watch from internet and trust me in years it wont change the time for a second. But still if it matters to some, you can check the correct time by internet once in every 3months . But if you prefer to pay extra $100 for this feature you can get it .

jitu6669 originally posted on ebay.com
Blue Bezel Watch GA100-1A2
5 February 2023

I am happy with this purchase. I read some reviews prior and can add that thje backlighting serves no purpose and the watch is hard to read in low light situations. This is not an issue for me but the design prior to release should resolve these issues. as they add an negative undertone to what is a good product. For me I would give it 5 stars of not for the readability issue.

John D. originally posted on watchdirect.com.au
Comfortable homage
31 October 2022

For the price point- an absolute must buy. Dont think they are available anymore. Remaining pieces are selling for three times the original retail. Sure way of testing - original backlights up the entire watch. This is a rep for an unbelievable price. Also, there are better reps available at similar price points- slept on them when available. Hope these pics help, cuz I couldnt find actual pics of detailed reps - especially the straps.

shivasdev originally posted on ebay.com
Daylight biased reversed feature windows.
26 July 2021

The yellow is pretty much the yellow of Lego. It matches my Jeep. Corvette, Porsche and Ferrari use a similar color. Ford's yellow is a tad more orange. It's dandelion yellow, not banana. I don't get the reviews complaining of a misleading color. It's spot on in the pictures. The watch itself is cool. The speed hand at 12 o'clock is of dubious value but maybe I'm not timing many aircraft, IDK. The reversed information windows are great in the bright sun but of little value in normal inside light. Still, this watch is more style than practical unless you have a specific application. The lighted dial feature will show the time and is pretty nice in total darkness but you won't get anything other than the analog time and a cool looking face with the light feature.

htimsmk originally posted on ebay.com
Definately NOT the "Ultimate" Tactical Watch
14 April 2016

First off, I am not fussy but I AM picky and expect my stuff to perform exactly as it should (or I feel it should) when I want/need it to do so. I have 8 G-Shock watches so am not new to this product in the least and feel I can share this review and give input with accuracy and confidence.Because I've worked as an X-Ray and CT Technologist for 15 yrs, I am often in dim rooms and surgery suites. I also enjoy mountain biking, the outdoors, and shooting when not looking inside people. Point is, I use my stuff and expect a lot from it. THIS particular model, while very attractive, has HORRIBLE lighting for night or dim situations. This light illuminates from a small yellowish light at the bottom of the face and shines upward. This causes shadows and makes it difficult ... MoreFirst off, I am not fussy but I AM picky and expect my stuff to perform exactly as it should (or I feel it should) when I want/need it to do so. I have 8 G-Shock watches so am not new to this product in the least and feel I can share this review and give input with accuracy and confidence.Because I've worked as an X-Ray and CT Technologist for 15 yrs, I am often in dim rooms and surgery suites. I also enjoy mountain biking, the outdoors, and shooting when not looking inside people. Point is, I use my stuff and expect a lot from it. THIS particular model, while very attractive, has HORRIBLE lighting for night or dim situations. This light illuminates from a small yellowish light at the bottom of the face and shines upward. This causes shadows and makes it difficult to read the hands, let alone the dark, unilluminated digital fields on the lower part of the face. This is NOT great. In fact, had the Red model of this with the red hour hand. It looked really great and people complemented me often on it's looks. However, in a dimly lit x-ray room or late dusk outside, I could see the minute hand clearly but the red hour hand seemed to "disappear" into the dark face due to its dark color, thus telling me it was 10 min to __?__. I sold it but still have the Baby Blue/White of the GA110 version of this and get TONS of complements but will use it when I want looks not function. Also, because the face is so "busy" it is hard to read the time well at a glance without having to study the face. IMHO, the BETTER choice may be the similar shaped model GD110. If not that style, at least pick ANY of the G-Shocks that state in the Specs " •Auto LED Backlight (Super Illuminator)" This completely illuminates the digital fields clearly. No question. My GD100SC-1 Watch - Black/Green face, lights up so bright you can literally read with it- easily (for the 3 seconds it stays on). NO exaggeration. Not the case with the GA110 versions or any iterations that say "Afterglow." One of my favorite versions is the GLX150 series. Super easy to read, has the Super Illuminator backlight, as well as a tide graph/moon phase (neat but neither here nor there) and the buttons are easy to activate. The Mudman watch buttons can be a chore to push and activate (the reason I sold this one), as they are completely sealed so no dirt, grime, or water can get in at all- totally sealed system.These are just my thoughts on a big and lasting investment and hope this helps with your future purchase. Now get out there and have safe fun!

originally posted on tacticalgear.com
Disappointing watch
15 November 2021

I wanted to like this watch, I really did. Unfortunately, I returned it after a few days.The pros: The watch looks good and feels solid. In the right light, is easy to read. The analog portion is easy to read.The cons: The digital part of the watch is incredibly hard to read except under ideal lighting conditions, with light bouncing off at just the right angle.In dim light, the "light" lights up the hands of the watch ok. It does not light up the digital display, at all. Why the digital display doesn't light up is beyond me, but it seems like a poor design decision.Because the digital portion is so difficult to read, using any of the functions of the digital portion is near impossible.

John originally posted on walmart.com
Gshock Ga100-1a1 is awesome!!!!
25 February 2020

This gshock is one of the toughest,best looking watches iv ever owned. It is a X-Large cased watch which makes it that much more better, and the black on black just really makes this watch pop . Now one thing people do not realize about these military blackout version is that the LED back light is not going to be a super illuminated that's going to light up a room. This watch has an amber led that gives you literally just enough light to see the analog hands of the watch. Which it is less distracting but then again it would be nice to see the face of the watch. Iv seen both good and bad reviews for this watch well before I ever purchased it but as for me I absolutely love it. It wears comfortably its suits good on a 7and a half inch wrist and it's not as heavy as it ... MoreThis gshock is one of the toughest,best looking watches iv ever owned. It is a X-Large cased watch which makes it that much more better, and the black on black just really makes this watch pop . Now one thing people do not realize about these military blackout version is that the LED back light is not going to be a super illuminated that's going to light up a room. This watch has an amber led that gives you literally just enough light to see the analog hands of the watch. Which it is less distracting but then again it would be nice to see the face of the watch. Iv seen both good and bad reviews for this watch well before I ever purchased it but as for me I absolutely love it. It wears comfortably its suits good on a 7and a half inch wrist and it's not as heavy as it appears. All in all I would recommend this Gshock to anyone wanting a tough,great looking everyday watch that will stand the test you put it thru and then some. I own several gshocks, 18 total from this blackout Ga100 to the frog man to each version of the mudmaster and unless its something absolutely formal I chose this ga100 every time. You will not be disappointed buying this watch. But do your research and make sure you are buying from a authorized Gshock dealer because there are plenty of scammers making copies. Believe me it's worth the extra money to have a true authentic Gshock.

blha_4658 originally posted on ebay.com

Specification

Parts NumberGA-100-1A2 , GA 100 1A2
ColorwayBlack/Blue
Upper MaterialFabric
Toe TypeRound Toe
Heel TypeFlat heel