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G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a
G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a

G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a

G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a

$135.00

(13,972 reviews)

Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.

Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.

(13,972 reviews)

Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.

Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.

$135.00 - $299.00

in 34 offers

The lowest price for G-Shock Casio GA-2100 Series Analog-Digital Black Resin Watch 48.5mm - Ga2100-1a right now is $135.00 at Chrono24.com.au, compared across 14 retailers.

The all-time low was $89.00 on 16 Mar 2026 — today's price is 52% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 22 June 2026.

Price comparison

Price data powered by pricesAPI.io

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

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Chrono24.com.au

$135.00

Casio G-Shock GA-2100K-2AJF Black 48.5x45.4mm

Delivery $44

Chrono24.com.au

$143.00

Casio G-Shock GA-2100K-5AJF Black 48.5x45.4mm

Delivery $43

Chrono24.com.au

$143.00

Casio G-Shock GA-2100K-2AJF Black 48.5x45.4mm

Delivery $43

Chrono24.com.au

$144.00

Casio G-Shock GA-2100K-1AJF Black 48.5x45.4mm

Delivery $36

Iguana Sell AU

$145.00

G-SHOCK Casio Classic Quartz Watch, Resin, Black, 48.5 × 45.4mm, GA-2100-1AER

Delivery $59

THE ICONIC

$152.74

GA2100K-5A

Free 30-day returns

First Class Watches

$160.00

Casio G-Shock Bright Metallic Dial Series (45.4mm) Silver Watch

Free delivery

First Class Watches

$170.00

Casio G-Shock Bright Metallic Dial Series (45.4mm) Sky Blue Watch

Free delivery

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$190.00

Casio G-Shock 2100 Series Original (45.4mm) Black Dial / Watch

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$225.00

Casio G-Shock 2100 Series Original Camouflage (45.4mm) Black Watch

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Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

9 July 2024

originally posted on joom.com

Please note, that the seller indicates the price with no discount, which may end up in some additional import fee like in my case. I paid 142 EUR the seller indicated 160 EUR, And I had to pay additional taxes because of the country limit of below 150 EUR tax free.Beside that everything looks good. fast delivery and looks perfect on the wrist.

Best EDC watch I've owned
16 June 2024Michael W.

originally posted on casio.com

To me, it's a perfect size for the wrist. The model that comes with the Cordura strap is well worth it. Much more comfortable than the rubber to me. I can wear the watch for hours, even in the heat, and can hardly notice. The only two gripes I have is that the buttons on the side are fairly hard to push in because of how they are recessed, and if you DO need to tell the time at night, it's hard to tell the time. The lume is good, but doesn't last that long, and you don't want to burn the battery up using the light too much. If you work in darker environments, the model with the white markers would probably be more suited because it's more legible. Overall though, love the watch and would happily buy it again.

Disappointed
7 April 2024Gilbert V.

originally posted on casio.com

Well, these are my honest thoughts. First the pros; it is a cool looking watch, with lots of bells and whistles. I also like the black codura watch band. Now for the cons; I find a "Major Design Flaw" with this model and other similar Casio watches, It's an enigma to me why Casio could not just had added a dial to adjust the analog hands. Instead, I had to go to YouTube for a tutorial video on instructing me to press this button and that button and another just to adjust the hands. I think it takes away from the functional use of this of what I consider a very good product. And just because of this simple flaw, I believe I purchased a lemon of a watch. If I knew this beforehand, I would not have bought this model. In fact, I'm so disappointed. I'm thinking, of ... MoreWell, these are my honest thoughts. First the pros; it is a cool looking watch, with lots of bells and whistles. I also like the black codura watch band. Now for the cons; I find a "Major Design Flaw" with this model and other similar Casio watches, It's an enigma to me why Casio could not just had added a dial to adjust the analog hands. Instead, I had to go to YouTube for a tutorial video on instructing me to press this button and that button and another just to adjust the hands. I think it takes away from the functional use of this of what I consider a very good product. And just because of this simple flaw, I believe I purchased a lemon of a watch. If I knew this beforehand, I would not have bought this model. In fact, I'm so disappointed. I'm thinking, of selling it on Ebay and getting what I can for it. I've owned several Casio watches over the years and have always been impressed with their accuracy, ruggedness and price. This time not so much. I think I'll just stick with my current analog Casio. At least I won't have to go to YouTube to figure out how to adjust the hands.

Specification

Band MaterialsResin
Case ShapesRound
DisplayAnalog-Digital
Watch StylesCasual
Dial ColorBlack

Price comparison

Updated 3 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Chrono24.com.au

$135.00

Casio G-Shock GA-2100K-2AJF Black 48.5x45.4mm

Delivery $44

Chrono24.com.au

$143.00

Casio G-Shock GA-2100K-5AJF Black 48.5x45.4mm

Delivery $43

Chrono24.com.au

$143.00

Casio G-Shock GA-2100K-2AJF Black 48.5x45.4mm

Delivery $43

Chrono24.com.au

$144.00

Casio G-Shock GA-2100K-1AJF Black 48.5x45.4mm

Delivery $36

Iguana Sell AU

$145.00

G-SHOCK Casio Classic Quartz Watch, Resin, Black, 48.5 × 45.4mm, GA-2100-1AER

Delivery $59

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

9 July 2024

Please note, that the seller indicates the price with no discount, which may end up in some additional import fee like in my case. I paid 142 EUR the seller indicated 160 EUR, And I had to pay additional taxes because of the country limit of below 150 EUR tax free.Beside that everything looks good. fast delivery and looks perfect on the wrist.

originally posted on joom.com
Best EDC watch I've owned
16 June 2024

To me, it's a perfect size for the wrist. The model that comes with the Cordura strap is well worth it. Much more comfortable than the rubber to me. I can wear the watch for hours, even in the heat, and can hardly notice. The only two gripes I have is that the buttons on the side are fairly hard to push in because of how they are recessed, and if you DO need to tell the time at night, it's hard to tell the time. The lume is good, but doesn't last that long, and you don't want to burn the battery up using the light too much. If you work in darker environments, the model with the white markers would probably be more suited because it's more legible. Overall though, love the watch and would happily buy it again.

Michael W. originally posted on casio.com
Disappointed
7 April 2024

Well, these are my honest thoughts. First the pros; it is a cool looking watch, with lots of bells and whistles. I also like the black codura watch band. Now for the cons; I find a "Major Design Flaw" with this model and other similar Casio watches, It's an enigma to me why Casio could not just had added a dial to adjust the analog hands. Instead, I had to go to YouTube for a tutorial video on instructing me to press this button and that button and another just to adjust the hands. I think it takes away from the functional use of this of what I consider a very good product. And just because of this simple flaw, I believe I purchased a lemon of a watch. If I knew this beforehand, I would not have bought this model. In fact, I'm so disappointed. I'm thinking, of ... MoreWell, these are my honest thoughts. First the pros; it is a cool looking watch, with lots of bells and whistles. I also like the black codura watch band. Now for the cons; I find a "Major Design Flaw" with this model and other similar Casio watches, It's an enigma to me why Casio could not just had added a dial to adjust the analog hands. Instead, I had to go to YouTube for a tutorial video on instructing me to press this button and that button and another just to adjust the hands. I think it takes away from the functional use of this of what I consider a very good product. And just because of this simple flaw, I believe I purchased a lemon of a watch. If I knew this beforehand, I would not have bought this model. In fact, I'm so disappointed. I'm thinking, of selling it on Ebay and getting what I can for it. I've owned several Casio watches over the years and have always been impressed with their accuracy, ruggedness and price. This time not so much. I think I'll just stick with my current analog Casio. At least I won't have to go to YouTube to figure out how to adjust the hands.

Gilbert V. originally posted on casio.com
G shock Disappointment
2 April 2024

Very underwhelming. My eyesight is really good and I can barely read the time / text on this watch . It’s Not for me. I will be selling or return this watch. The metal on the watch band that holds the watch doesn’t hold the strap in place . Terrible design . The only positive is that the Cordura strap is comfortable, but this watch is a huge disappointment and I am a fan of G shock watches . Thumbs down and Wouldn’t recommend this watch for anybody.

Jonathan T. originally posted on casio.com
Great styling just needs a tweak
28 June 2024

Love the look of the watch and $120 is a decent price. The thing I don't like is the metal on the strap. Once the watch is secured those metal pieces are very uncomfortable and I sort of regret getting the cordura strap for this reason. I feel I would have been better off with the rubber strap as it would be more comfortable especially when doing something active........the sole purpose I bought the watch.

Nicholas W. originally posted on casio.com
It’s cool
19 June 2024

But pretty sure it’s stuck in Tokyo time or something it won’t let me find my time zone. The hour hands don’t line up to the digital time at all.. I got it for my wife and was kinda bummed also the day hand is off even when you set it and put it back to normal . As you can see my tan and dark blue watch are normal time. The light blue is off and have set it 3 times before her birthday !

Tyler K. originally posted on casio.com
Lovely watch. Nice design and
29 May 2024

Lovely watch. Nice design and nice size. Not too chunky but not too small. Looks smart and sleek on my wrist.Well packaged,I thought it had a bluetooth connection for connecting to phone an updating times but I must have been mistaken

Peter A. originally posted on g-shock.co.uk
Nice watch
23 June 2024

Love the durability of G-Shock and reliability of Casio. Unfortunately, there is still some left over material from mold extraction and it's pretty thick. I am avoiding cutting off the excess material so I don't accidently damage the integrity of it. The 2 metal rings that hold the band in place are also not the best designed. They don't stay in place and the end of the band sticks out. Other than that. Great watch.

Anthony K. originally posted on casio.com
Visually appealing, leaves to be desired
31 March 2024

I will start by saying I have around 15 Gshock watches range if from $40 to $350/400. The discontinued GSTS130BC with a metal watch, and cordura/leather hybrid band has been my favorite watch since 2015. When I saw this watch released, I immediately made plans to purchase it based off its visual similarities to the above mentioned watches. I did not expect the same quality, with a $150 price difference between the two, but I was surprised with how cheap the cordura strap feels, and how easily the finish appears to wear on the watch itself. I do like the watch for its price point, but out of all the GSHOCK’s I own, this one “feels” the cheapest.

Aaron M. originally posted on casio.com
Wanted to love it
12 May 2024

I love that the watch is lightweight. Not as thick as the other g shock watches which is great! Setting the time was a breeze without reading the instructions. Now, what I didn’t like was that the light can be better. Doesn’t illuminate the whole face of the watch. I returned mine due to the fact that being a nato strap (two piece), the 2-piece buckle that holds the strap at the end keeps coming loose or moving thst the strap pops out. It’s annoying to me. Then with this, made me realize that the watch is really too big for my wrist😞. I ended up returning it. Wish they could make a 40mm watch of this version with better nato straps and even thinner design.

Georgina D. originally posted on casio.com

Specification

Band MaterialsResin
Case ShapesRound
DisplayAnalog-Digital
Watch StylesCasual
Dial ColorBlack

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