G-Shock Digital & Analogue Watch GA100B-4A
The Casio G-Shock GA-100B-4ADR is a robust analog-digital combination watch for men featuring a striking black and red color scheme. This timekeeping instrument combines analog hands with a digital display and offers comprehensive timekeeping functions including time, date, and stopwatch. Built with Casio's proven shock-resistant technology, the watch withstands impacts and vibrations while providing precise time measurement. The mineral glass offers scratch resistance, and the case measures approximately 55 mm in diameter and 16 mm in thickness, ensuring a prominent presence on the wrist. With a water resistance of up to 200 meters (20 bar), it is suitable for professional maritime activities and surface water sports, but not for diving. The black resin strap with red accents complements the case design and features a secure pin buckle. Additional functions include an automatic calendar, 1/1000-second stopwatch, countdown timer, and a fully automatic calendar pre-programmed until 2099. The watch uses a standard SR927W battery with an approximate lifespan of 2 years. The eye-catching red and black color combination ensures high visibility with a professional appearance, making it suitable for both active and leisure use. The GA-100 series is known for its military-inspired design and reliable performance under demanding conditions.
The Casio G-Shock GA-100B-4ADR is a robust analog-digital combination watch for men featuring a striking black and red color scheme. This timekeeping instrument combines analog hands with a digital display and offers comprehensive timekeeping functions including time, date, and stopwatch. Built with Casio's proven shock-resistant technology, the watch withstands impacts and vibrations while providing precise time measurement. The mineral glass offers scratch resistance, and the case measures approximately 55 mm in diameter and 16 mm in thickness, ensuring a prominent presence on the wrist. With a water resistance of up to 200 meters (20 bar), it is suitable for professional maritime activities and surface water sports, but not for diving. The black resin strap with red accents complements the case design and features a secure pin buckle. Additional functions include an automatic calendar, 1/1000-second stopwatch, countdown timer, and a fully automatic calendar pre-programmed until 2099. The watch uses a standard SR927W battery with an approximate lifespan of 2 years. The eye-catching red and black color combination ensures high visibility with a professional appearance, making it suitable for both active and leisure use. The GA-100 series is known for its military-inspired design and reliable performance under demanding conditions.
The Casio G-Shock GA-100B-4ADR is a robust analog-digital combination watch for men featuring a striking black and red color scheme. This timekeeping instrument combines analog hands with a digital display and offers comprehensive timekeeping functions including time, date, and stopwatch. Built with Casio's proven shock-resistant technology, the watch withstands impacts and vibrations while providing precise time measurement. The mineral glass offers scratch resistance, and the case measures approximately 55 mm in diameter and 16 mm in thickness, ensuring a prominent presence on the wrist. With a water resistance of up to 200 meters (20 bar), it is suitable for professional maritime activities and surface water sports, but not for diving. The black resin strap with red accents complements the case design and features a secure pin buckle. Additional functions include an automatic calendar, 1/1000-second stopwatch, countdown timer, and a fully automatic calendar pre-programmed until 2099. The watch uses a standard SR927W battery with an approximate lifespan of 2 years. The eye-catching red and black color combination ensures high visibility with a professional appearance, making it suitable for both active and leisure use. The GA-100 series is known for its military-inspired design and reliable performance under demanding conditions.
The Casio G-Shock GA-100B-4ADR is a robust analog-digital combination watch for men featuring a striking black and red color scheme. This timekeeping instrument combines analog hands with a digital display and offers comprehensive timekeeping functions including time, date, and stopwatch. Built with Casio's proven shock-resistant technology, the watch withstands impacts and vibrations while providing precise time measurement. The mineral glass offers scratch resistance, and the case measures approximately 55 mm in diameter and 16 mm in thickness, ensuring a prominent presence on the wrist. With a water resistance of up to 200 meters (20 bar), it is suitable for professional maritime activities and surface water sports, but not for diving. The black resin strap with red accents complements the case design and features a secure pin buckle. Additional functions include an automatic calendar, 1/1000-second stopwatch, countdown timer, and a fully automatic calendar pre-programmed until 2099. The watch uses a standard SR927W battery with an approximate lifespan of 2 years. The eye-catching red and black color combination ensures high visibility with a professional appearance, making it suitable for both active and leisure use. The GA-100 series is known for its military-inspired design and reliable performance under demanding conditions.
in 19 offers
The lowest price for G-Shock Digital & Analogue Watch GA100B-4A right now is $105.71 at Amazon.com.au, compared across 18 retailers.
The all-time low was $90.00 on 8 Mar 2026 — today's price is 17% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 13 July 2026.
Last updated at 13/07/2026 06:27:58
G-SHOCK CASIO Men's G-Shock Analog and Digital Watch, Red/Black Dial, Red Band
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!
Casio G-Shock GA-100B-4A Red & Black Analog Digital Men's Watch
Free delivery between Wed – Sat
G-Shock Military Red Men's Watch GA100B-4A
Free delivery between 16–24 July
Casio Watch G-shock Ga-100b-4a Men's Red In Box
Delivery between 20–21 July $23.50
Casio G-Shock GA-100B-4ADR Mens Red Analogue Digital Sport Watch... | uWatch Australia
Free delivery
Casio G-Shock GA-100B-4ADR Analog Digital Resin Strap Mens Red Watch 200m WR
Free delivery between 20–24 July
Casio G-Shock GA-100B-4A Analog-Digital Combination
Delivery $35.35
Casio G-Shock Red Analog Digital Watch GA-100B-4A GA100B
Free delivery
Casio G-Shock Red Analog Digital Watch GA-100B-4A GA100B
Free delivery
GA100B-4A
Free delivery
originally posted on walmart.com
If you are looking to find a watch for outdoor or active use, this one is great! The material design is very durable and waterproof and works well for hiking, sports, or camping, and the clasps are very secure to keep the watch from falling off. Likewise, the screen is fingerprint resistant and doesn’t show smudges or scuffs, and the included tin case is great to protect it during transport. The illumination setting makes it also accessible for night-time use, but I wish the actual watch screen would light up instead of just shining light on the physical clock hands. The watch already comes set up for most functions, but I would definitely recommend reading the instruction manual when setting the time! The watch cycles between multiple time zones, which could be ... MoreIf you are looking to find a watch for outdoor or active use, this one is great! The material design is very durable and waterproof and works well for hiking, sports, or camping, and the clasps are very secure to keep the watch from falling off. Likewise, the screen is fingerprint resistant and doesn’t show smudges or scuffs, and the included tin case is great to protect it during transport. The illumination setting makes it also accessible for night-time use, but I wish the actual watch screen would light up instead of just shining light on the physical clock hands. The watch already comes set up for most functions, but I would definitely recommend reading the instruction manual when setting the time! The watch cycles between multiple time zones, which could be helpful with travel, but it made things a little more difficult during initial setup. And I appreciate that while there is no physical second hand, there is still an electronic second counter for easy timekeeping. As for the size of the watch itself, the watch face looks very large for smaller wrists like mine, but the watch band is still one-size-fits-all. Altogether, this watch is great for active use, and the included functions are perfect for all of your timekeeping needs!
originally posted on walmart.com
This G-Shock watch is not for everyone. It does not have a fancy touch screen or health-tracking capabilities. It is just a rugged watch for sports and outdoor enthusiasts.This watch is masculinely big but is light and comfortable to wear. The watch is huge because of its extra-large water-proof and shock-proof casing. It is one of the larger models in the G-Shock family and is one of the few to feature an all-plastic band and buckle. I personally don't mind the plastic buckle but long-time G-Shock loyalists may prefer metal.The watch is unique in that it has a combination of analog hands and digital displays. The reverse LCD reads fine in bright light but is very hard to see in low light. There is no backlit and the dim LED light is just bright enough to see ... MoreThis G-Shock watch is not for everyone. It does not have a fancy touch screen or health-tracking capabilities. It is just a rugged watch for sports and outdoor enthusiasts.This watch is masculinely big but is light and comfortable to wear. The watch is huge because of its extra-large water-proof and shock-proof casing. It is one of the larger models in the G-Shock family and is one of the few to feature an all-plastic band and buckle. I personally don't mind the plastic buckle but long-time G-Shock loyalists may prefer metal.The watch is unique in that it has a combination of analog hands and digital displays. The reverse LCD reads fine in bright light but is very hard to see in low light. There is no backlit and the dim LED light is just bright enough to see the analog hands in the dark.There are 4 buttons on the case used to set up the watch's many features such as date/time, world time, alarms, hourly time signal, stopwatch, and countdown timer. There will be a learning curve but there are videos on the Internet to help with what buttons to press if the manual does not make sense.I wear this watch when I play sports (basketball, sand volleyball, etc.) or when I am near the water (pool, beach, boat, fishing) because it is tough and it is reasonably priced so I don't have to think or worry about it.
originally posted on walmart.com
This watch is massive!It's useful for many things, has many features that I can use but so much is built into it that I doubt I will ever fully understand.The instruction manual is very thick and can be a little bit confusing. Not everything is covered in the print version but the online version is far more helpful and makes more sense.The automatic settings are very useful but I would like to be able to set the time manually because you can't always find the instructions in the manual.There are some things I don't like about this watch. For one, the light isn't the best and can make viewing the time very difficult. I don't think there is a way to change the time display from black background and white numbers to white background and black numbers. The watch ... MoreThis watch is massive!It's useful for many things, has many features that I can use but so much is built into it that I doubt I will ever fully understand.The instruction manual is very thick and can be a little bit confusing. Not everything is covered in the print version but the online version is far more helpful and makes more sense.The automatic settings are very useful but I would like to be able to set the time manually because you can't always find the instructions in the manual.There are some things I don't like about this watch. For one, the light isn't the best and can make viewing the time very difficult. I don't think there is a way to change the time display from black background and white numbers to white background and black numbers. The watch can be painful on your wrist, especially if you have that one bone that sticks out. It can also be very difficult to change daylight savings time from on to off and you have to refer to the manual in order to do so.More to love than not. Really cool case and awesome colors and features. Casio has always been a reliable brand and it's good to see this particular model making a comeback in both civilian and military applications.Excellent watch and more useful than I will probably ever realize.
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G-SHOCK CASIO Men's G-Shock Analog and Digital Watch, Red/Black Dial, Red Band
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!
Casio G-Shock GA-100B-4A Red & Black Analog Digital Men's Watch
Free delivery between Wed – Sat
G-Shock Military Red Men's Watch GA100B-4A
Free delivery between 16–24 July
Casio Watch G-shock Ga-100b-4a Men's Red In Box
Delivery between 20–21 July $23.50
Casio G-Shock GA-100B-4ADR Mens Red Analogue Digital Sport Watch... | uWatch Australia
Free delivery
If you are looking to find a watch for outdoor or active use, this one is great! The material design is very durable and waterproof and works well for hiking, sports, or camping, and the clasps are very secure to keep the watch from falling off. Likewise, the screen is fingerprint resistant and doesn’t show smudges or scuffs, and the included tin case is great to protect it during transport. The illumination setting makes it also accessible for night-time use, but I wish the actual watch screen would light up instead of just shining light on the physical clock hands. The watch already comes set up for most functions, but I would definitely recommend reading the instruction manual when setting the time! The watch cycles between multiple time zones, which could be ... MoreIf you are looking to find a watch for outdoor or active use, this one is great! The material design is very durable and waterproof and works well for hiking, sports, or camping, and the clasps are very secure to keep the watch from falling off. Likewise, the screen is fingerprint resistant and doesn’t show smudges or scuffs, and the included tin case is great to protect it during transport. The illumination setting makes it also accessible for night-time use, but I wish the actual watch screen would light up instead of just shining light on the physical clock hands. The watch already comes set up for most functions, but I would definitely recommend reading the instruction manual when setting the time! The watch cycles between multiple time zones, which could be helpful with travel, but it made things a little more difficult during initial setup. And I appreciate that while there is no physical second hand, there is still an electronic second counter for easy timekeeping. As for the size of the watch itself, the watch face looks very large for smaller wrists like mine, but the watch band is still one-size-fits-all. Altogether, this watch is great for active use, and the included functions are perfect for all of your timekeeping needs!
This G-Shock watch is not for everyone. It does not have a fancy touch screen or health-tracking capabilities. It is just a rugged watch for sports and outdoor enthusiasts.This watch is masculinely big but is light and comfortable to wear. The watch is huge because of its extra-large water-proof and shock-proof casing. It is one of the larger models in the G-Shock family and is one of the few to feature an all-plastic band and buckle. I personally don't mind the plastic buckle but long-time G-Shock loyalists may prefer metal.The watch is unique in that it has a combination of analog hands and digital displays. The reverse LCD reads fine in bright light but is very hard to see in low light. There is no backlit and the dim LED light is just bright enough to see ... MoreThis G-Shock watch is not for everyone. It does not have a fancy touch screen or health-tracking capabilities. It is just a rugged watch for sports and outdoor enthusiasts.This watch is masculinely big but is light and comfortable to wear. The watch is huge because of its extra-large water-proof and shock-proof casing. It is one of the larger models in the G-Shock family and is one of the few to feature an all-plastic band and buckle. I personally don't mind the plastic buckle but long-time G-Shock loyalists may prefer metal.The watch is unique in that it has a combination of analog hands and digital displays. The reverse LCD reads fine in bright light but is very hard to see in low light. There is no backlit and the dim LED light is just bright enough to see the analog hands in the dark.There are 4 buttons on the case used to set up the watch's many features such as date/time, world time, alarms, hourly time signal, stopwatch, and countdown timer. There will be a learning curve but there are videos on the Internet to help with what buttons to press if the manual does not make sense.I wear this watch when I play sports (basketball, sand volleyball, etc.) or when I am near the water (pool, beach, boat, fishing) because it is tough and it is reasonably priced so I don't have to think or worry about it.
This watch is massive!It's useful for many things, has many features that I can use but so much is built into it that I doubt I will ever fully understand.The instruction manual is very thick and can be a little bit confusing. Not everything is covered in the print version but the online version is far more helpful and makes more sense.The automatic settings are very useful but I would like to be able to set the time manually because you can't always find the instructions in the manual.There are some things I don't like about this watch. For one, the light isn't the best and can make viewing the time very difficult. I don't think there is a way to change the time display from black background and white numbers to white background and black numbers. The watch ... MoreThis watch is massive!It's useful for many things, has many features that I can use but so much is built into it that I doubt I will ever fully understand.The instruction manual is very thick and can be a little bit confusing. Not everything is covered in the print version but the online version is far more helpful and makes more sense.The automatic settings are very useful but I would like to be able to set the time manually because you can't always find the instructions in the manual.There are some things I don't like about this watch. For one, the light isn't the best and can make viewing the time very difficult. I don't think there is a way to change the time display from black background and white numbers to white background and black numbers. The watch can be painful on your wrist, especially if you have that one bone that sticks out. It can also be very difficult to change daylight savings time from on to off and you have to refer to the manual in order to do so.More to love than not. Really cool case and awesome colors and features. Casio has always been a reliable brand and it's good to see this particular model making a comeback in both civilian and military applications.Excellent watch and more useful than I will probably ever realize.
I think I've had this watch for around 2 weeks.So far I've got it covered in cornice cement while doing rennos, cut up two massive fallen gum trees for firewood wearing it, two deer hunting trips in the hills, including lots of falls and bumps to the watch, building and populating 6 huge garden beds, river swimming, and servicing my ute.It hasn't skipped a beat.The watch is accurate, but the digital display is garbage. It would be perfect if it was just the dial with time and date.All in all a great purchase for the price.
Love this watch. This is my fourth G-SHOCK, and I'll be buying more.PROS:- Rugged and built for the active person that also works as a stylish piece of jewelery.- Digital AND hour/minute hands.- Excellent time keepingCONS:- Difficult to replace battery. Although this is due to being built to be an outdoor, active wear watch
This watch is strong and dependable, perfect for daily use. It's shock-resistant, making it tough enough for any active lifestyle. The watch includes features like a chronograph, alarm, and stopwatch, combining both style and functionality. Its water resistance also makes it suitable for different environments. Overall, it's a great pick for anyone looking for a durable, practical, and stylish watch.
Because this watch was also made as a military, special ops, covert ops, etc. type of watch. That's why it's mostly all subdued, except for the hands. For cover and concealment, light discipline, black out ops, or any other mission or assignment where you don't wanna wear a watch that will reflect light , or give off any type of glow. It's not because the engineers mistakenly didn't design the display or indicating functions too dark; it was design this way or purpose. It's a perfect watch for this, and also for any person who wants a tough, tactical, rugged, badass, yet inexpensive watch made for everyone. If you're concern is too read the functions easy, then there are many other series for that. I just wanted to comment because after reading about 20 comments, ... MoreBecause this watch was also made as a military, special ops, covert ops, etc. type of watch. That's why it's mostly all subdued, except for the hands. For cover and concealment, light discipline, black out ops, or any other mission or assignment where you don't wanna wear a watch that will reflect light , or give off any type of glow. It's not because the engineers mistakenly didn't design the display or indicating functions too dark; it was design this way or purpose. It's a perfect watch for this, and also for any person who wants a tough, tactical, rugged, badass, yet inexpensive watch made for everyone. If you're concern is too read the functions easy, then there are many other series for that. I just wanted to comment because after reading about 20 comments, half were complaints only about the watch being a little difficult to read. Shake it off fellas, and buy a bright Micky Mouse watch if you want an easy to read one. This is for the person that is used to difficult situations; and in the case of military ops, being difficult to read could (and probably has before) save lives. Army retired
I got home from work, happy another new g-shock. Opened cardboard box pulled out tin, popped too off to find the plastic wrapper that comes on the watch with no watch wrapped on foam!! Nothing but packing material inside and the manual, registration card and part of foam outside the tin! Seriously an empty tin. Thanks for snatching the little joy of a new g-shock by sending empty tin. So I have to return the empty tin I guess to the store and get a refund? How about sending the watch I wanted that was marked down to $58 from $100 retail? So now I have empty tin, no watch and I can go to store and try to explain I received an empty tin? I’m not happy at all.
G-Shock Military Matte Black Watch GA100-1A1 is an excellent watch for welders who need something tough enough to withstand the rigors of the job.The shock-resistance is second to none, and it is designed to be both water and dust-resistant.Overall, G-Shock Military Matte Black Watch GA100-1A1 is a great choice for welders who need a watch that’s tough enough to handle the job. It’s durable, water-resistant, and features an impressive battery life. It’s also easy to read and operate, making it the perfect watch for tradies on the go.
This G-Shock watch by Casio is the traditional standard of watches when it comes to ruggedness. Popular by demand for it's design and quality for many decades, it has been worn on many wrists. This iteration is no different.The watch has all the different time zones, five daily alarms that can be set, a timer, and a stopwatch function. It is also water resistant to 20 bar, which is 200 meters or about 600 feet. So no problem swimming with this on. It also has a button to illuminate the watch face like a mini flashlight. There are 4 other meaty buttons, two on each side that do various functions.I like watches that are big and chunky with some heft, as I have manly wrists. Surprisingly, this watch is almost as light as a feather. The battery should last about 5 ... MoreThis G-Shock watch by Casio is the traditional standard of watches when it comes to ruggedness. Popular by demand for it's design and quality for many decades, it has been worn on many wrists. This iteration is no different.The watch has all the different time zones, five daily alarms that can be set, a timer, and a stopwatch function. It is also water resistant to 20 bar, which is 200 meters or about 600 feet. So no problem swimming with this on. It also has a button to illuminate the watch face like a mini flashlight. There are 4 other meaty buttons, two on each side that do various functions.I like watches that are big and chunky with some heft, as I have manly wrists. Surprisingly, this watch is almost as light as a feather. The battery should last about 5 years, but I suspect it would be less than that using the built-in mini flashlight every so often. This is not a smart watch where you would need to charge every night, so it is ideal for the long trip outdoors.Overall, this G-Shock is your typical ruggedness that we've all come to know over the years, and still going strong. It's sturdy and strong and can take a beating and still tick tock. Highly recommended.
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