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G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'
G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'

G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'

G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak'

$308.77

(834 reviews)

The Casio G-SHOCK Octagon Bluetooth Solar GBM-2100A-1A3ER watch bases its operation on a state-of-the-art solar mechanism. The black plastic strap is combined here with a silver-colored envelope, for the manufacture of which glass-fiber-reinforced resin and stainless steel were used. Mineral glass is responsible for protecting the green dial. Product features include bluetooth, world time, power saving, find phone, mute, 5 daily alarms, perpetual calendar, stopwatch, timer and Super Illuminator backlight. The model is distinguished by shock resistance and 200-meter water resistance.

The Casio G-SHOCK Octagon Bluetooth Solar GBM-2100A-1A3ER watch bases its operation on a state-of-the-art solar mechanism. The black plastic strap is combined here with a silver-colored envelope, for the manufacture of which glass-fiber-reinforced resin and stainless steel were used. Mineral glass is responsible for protecting the green dial. Product features include bluetooth, world time, power saving, find phone, mute, 5 daily alarms, perpetual calendar, stopwatch, timer and Super Illuminator backlight. The model is distinguished by shock resistance and 200-meter water resistance.

(834 reviews)

The Casio G-SHOCK Octagon Bluetooth Solar GBM-2100A-1A3ER watch bases its operation on a state-of-the-art solar mechanism. The black plastic strap is combined here with a silver-colored envelope, for the manufacture of which glass-fiber-reinforced resin and stainless steel were used. Mineral glass is responsible for protecting the green dial. Product features include bluetooth, world time, power saving, find phone, mute, 5 daily alarms, perpetual calendar, stopwatch, timer and Super Illuminator backlight. The model is distinguished by shock resistance and 200-meter water resistance.

The Casio G-SHOCK Octagon Bluetooth Solar GBM-2100A-1A3ER watch bases its operation on a state-of-the-art solar mechanism. The black plastic strap is combined here with a silver-colored envelope, for the manufacture of which glass-fiber-reinforced resin and stainless steel were used. Mineral glass is responsible for protecting the green dial. Product features include bluetooth, world time, power saving, find phone, mute, 5 daily alarms, perpetual calendar, stopwatch, timer and Super Illuminator backlight. The model is distinguished by shock resistance and 200-meter water resistance.

$308.77 - $651.05

in 21 offers

The lowest price for G-Shock GBM2100A-1A3 Metal Covered Bluetooth 'CasiOak' right now is $308.77 at eBay.com.au, compared across 11 retailers.

The all-time low was $197.46 on 5 June 2026 — today's price is 56% 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 19:30:54

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

$308.77

Casio G-shock G-steel Bluetooth Solar Black Resin Band 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

$312.00

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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

$333.30

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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

$380.11

Casio G-shock G-steel Bluetooth Solar Black Resin Band 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

$391.39

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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

$414.62

Casio G-shock Gbm-2100a-1a3jf Green Men's Watch From Jp W/box - Fast

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

$416.24

Casio G-steel 2100 Series Green Dial Watch Gbm2100a-1a3

Delivery $39.27

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

$469.90

G-shock Casioak Gbm2100a-1a3

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

$525.00

G-shock Solar Power Black Resin Band Watch Gbm2100a-1a3

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

$651.05

Casio G-shock Gbm-2100a-1a3dr Solar Bluetooth Green Dial 200m Japan

Delivery $8.80

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

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

Reviews

As a bit of a
4 September 2024Craig S.

originally posted on g-shock.co.uk

As a bit of a collector, I couldn't resist buying this fantastic looking G Shock with the ice blue dial.Looks fabulous on wrist and although initially I thought the strap was a bit hard, it is comfy to wear and looks great.

Glad I purchased this watch,
9 July 2024PAUL B.

originally posted on g-shock.co.uk

Glad I purchased this watch, love the blue colour against the metal and strap. Once I could work out how to Bluetooth watch to app, love how it could be set up quickly. Tough solar excellent. Tempted to buy other colour ways.

Great Watch - if you can see it.
29 March 2024AndyC

originally posted on johnlewis.com

I am a watch collector with everything from watches associated with my phone to many classic automatics. I just buy what I like and always on the lookout for something different have looked at G-Shock in general and this watch in particular. I have never seen this one in the flesh. Just on photographs and it looks as good as the photographs but with one issue. See below.When this watch was delivered I was first struck by the rather basic presentation in a tin box but to be fair I have many very smart watch boxes and they all just take up space anyway. The watch itself was covered in a great many adhesive strips which meant it was well protected but took an age to get off. Then on to setting it up.I am a firm believer in "if all else fails read the instructions" ... MoreI am a watch collector with everything from watches associated with my phone to many classic automatics. I just buy what I like and always on the lookout for something different have looked at G-Shock in general and this watch in particular. I have never seen this one in the flesh. Just on photographs and it looks as good as the photographs but with one issue. See below.When this watch was delivered I was first struck by the rather basic presentation in a tin box but to be fair I have many very smart watch boxes and they all just take up space anyway. The watch itself was covered in a great many adhesive strips which meant it was well protected but took an age to get off. Then on to setting it up.I am a firm believer in "if all else fails read the instructions" and with this watch hit that point very quickly and the instructions were the normal complicated Casio large sheet of very tiny text. Now to a tip. Download the phone app. Then you just need to pair the watch with your phone and read the instructions from there. Once paired with the app it is great but note that the instructions for the first part of pairing is to hold button "B" for st least three seconds. After that repeatedly fails you discover that it takes at least five or six seconds before the little indicator hand you can't see moves to the right place for Bluetooth.Cut to an hour or so later and the watch is up and running. The only problem then is that it looks really good in the pictures and it is a very smart watch on the wrist but in anything other than bright light it is very hard to see the hands. That is the only reason for giving it three stars.If the watch had a more practical colour scheme it would easily be five stars. It looks good and is well made. The case and strap is as good as some of my watches which cost thousands and the extra functions (in watch talk, complications) over telling the time are very good. As a traveller I love being able to pick my destination by clicking on a map in the app and then tell the app to change my watch to the selected time zone. Then watch the hands spin to the required time zone. I have a Casio Red Arrows watch that adjusts to world time but it is such a complicated process to change the time I never use it for travel. This watch will get used as it is far more straightforward.Final point is that the watch comes with a very long bracelet which will fir just about any wrist. It is very easy to remove links but I will leave it to DIYers to check how.

Specification

Variant
titleDefault Title

Price comparison

Updated 2 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
eBay.com.au

$308.77

Casio G-shock G-steel Bluetooth Solar Black Resin Band 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

$312.00

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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

$333.30

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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

$380.11

Casio G-shock G-steel Bluetooth Solar Black Resin Band 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

$391.39

Casio G-shock Green Dial Sports Tough Solar 200m Gbm-2100a-1a3 Men's

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!

Price history

Price history

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

Reviews

As a bit of a
4 September 2024

As a bit of a collector, I couldn't resist buying this fantastic looking G Shock with the ice blue dial.Looks fabulous on wrist and although initially I thought the strap was a bit hard, it is comfy to wear and looks great.

Craig S. originally posted on g-shock.co.uk
Glad I purchased this watch,
9 July 2024

Glad I purchased this watch, love the blue colour against the metal and strap. Once I could work out how to Bluetooth watch to app, love how it could be set up quickly. Tough solar excellent. Tempted to buy other colour ways.

PAUL B. originally posted on g-shock.co.uk
Great Watch - if you can see it.
29 March 2024

I am a watch collector with everything from watches associated with my phone to many classic automatics. I just buy what I like and always on the lookout for something different have looked at G-Shock in general and this watch in particular. I have never seen this one in the flesh. Just on photographs and it looks as good as the photographs but with one issue. See below.When this watch was delivered I was first struck by the rather basic presentation in a tin box but to be fair I have many very smart watch boxes and they all just take up space anyway. The watch itself was covered in a great many adhesive strips which meant it was well protected but took an age to get off. Then on to setting it up.I am a firm believer in "if all else fails read the instructions" ... MoreI am a watch collector with everything from watches associated with my phone to many classic automatics. I just buy what I like and always on the lookout for something different have looked at G-Shock in general and this watch in particular. I have never seen this one in the flesh. Just on photographs and it looks as good as the photographs but with one issue. See below.When this watch was delivered I was first struck by the rather basic presentation in a tin box but to be fair I have many very smart watch boxes and they all just take up space anyway. The watch itself was covered in a great many adhesive strips which meant it was well protected but took an age to get off. Then on to setting it up.I am a firm believer in "if all else fails read the instructions" and with this watch hit that point very quickly and the instructions were the normal complicated Casio large sheet of very tiny text. Now to a tip. Download the phone app. Then you just need to pair the watch with your phone and read the instructions from there. Once paired with the app it is great but note that the instructions for the first part of pairing is to hold button "B" for st least three seconds. After that repeatedly fails you discover that it takes at least five or six seconds before the little indicator hand you can't see moves to the right place for Bluetooth.Cut to an hour or so later and the watch is up and running. The only problem then is that it looks really good in the pictures and it is a very smart watch on the wrist but in anything other than bright light it is very hard to see the hands. That is the only reason for giving it three stars.If the watch had a more practical colour scheme it would easily be five stars. It looks good and is well made. The case and strap is as good as some of my watches which cost thousands and the extra functions (in watch talk, complications) over telling the time are very good. As a traveller I love being able to pick my destination by clicking on a map in the app and then tell the app to change my watch to the selected time zone. Then watch the hands spin to the required time zone. I have a Casio Red Arrows watch that adjusts to world time but it is such a complicated process to change the time I never use it for travel. This watch will get used as it is far more straightforward.Final point is that the watch comes with a very long bracelet which will fir just about any wrist. It is very easy to remove links but I will leave it to DIYers to check how.

AndyC originally posted on johnlewis.com
I really like the clear
1 August 2024

I really like the clear analogue face and once I downloaded the correct app to set the watch was easily done. Looks real quality and really happy with it. Only slight issue for me is size of digital numerals. More my own eyesight but at certain times analogue hands obscure it. There is a function to move hands from mode area but it’s not easy to remember. But small things. Very happy

Simon B. originally posted on g-shock.co.uk
Overall a very good watch.
20 July 2024

Overall a very good watch. 4 stars rather than 5 for two reasons. Firstly the strap is a bit thin with quite hard plastic. It’s comfortable enough but can be improved upon. Secondly because the watch is symmetrical it’s easy to hit the wrong button in the dark for the backlight.

Marc K. originally posted on g-shock.co.uk
Review Title
28 August 2024

Bought a Casio G Shock watch recently and have to say I was very impressed with the experience. As well as it being well priced it also arrived 2 days earlier than advised, with very good tracking updates provided by DPD. Would definitely use again.

Daniel originally posted on firstclasswatches.co.uk
Review of Metal Covered 2100 Ice Blue Bluetooth Solar Watch
16 September 2024

I absolutely love this latest iteration of the iconic CasiOak and it is by far my favourite that I own so far. The metal case with ice blue solar dial is just beautiful. Really fast delivery by Francis & Gaye Jewellers who also offered a lower price than most other retailers. Very happy purchase!

Reviewed by Francis & Gaye Ltd customer originally posted on francisandgaye.co.uk
Such a smart looking watch
7 August 2024

Such a smart looking watch and a real eye-catcher. I've had a lot of people ask me about the watch already.It's also very comfortable wear and I really like the solar feature.

MICHAEL T. originally posted on g-shock.co.uk
The best G-Shock yet!
18 July 2024

Superb watch, striking looks, no more negative display so now it’s easy to read, solar powered and with the black face the hands stand out to make telling time much easier. This watch is everything I’ve been waiting for.

JIVERS originally posted on g-shock.co.uk
The ultimate ‘go anywhere, do
7 July 2024

The ultimate ‘go anywhere, do anything’ summer watch. I have three other G-Shocks, but this one tops the lot. Slightly smaller, but still with the G-Shock wrist presence. And the blue dial - a thing of beauty. If you don’t need the full range of functions - barometer, altimeter etc - you need this watch!

Nick T. originally posted on g-shock.co.uk

Specification

Variant
titleDefault Title

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