Fast international shipping →

Height of the model:

Casio G-Shock Original GA-100-1A4ER Watch

Rating:
94% of 100
Shipping: No delivery option
€98.96
Manufacturer's suggested price €134.39
Available product variants:
Product available in selected stores
Top
€98.96

Casio G-Shock Original GA-100-1A4ER Watch

Built for toughness, this water-resistant and shockproof sports timepiece features reliable quartz movement. Enhanced with an Auto-LED backlight for optimum visibility. The hands utilize a fluorescent Neobrite coating, ensuring clear readability in low-light conditions. A durable analog-digital dial is shielded by mineral glass boasting a Mohs hardness of 5.

Robust construction

Incorporating the G-Shock system along with a carbon-reinforced case enhances the watch’s durability against shocks and mechanical impacts. The dial is protected by mineral glass with a Mohs hardness rating of 5.

Equipped with high water resistance, the model withstands submersion to depths of 200 metres (20 bar), ensuring reliability for swimming and even diving activities.

Constructed to shield the movement from magnetic fields, the case adheres to ISO Standard 764.

Dial, Auto-LED backlight, Neobrite

35 mm analog-digital dial offers time indication in both 12-hour and 24-hour formats. Outfitted with an Auto-LED backlight that activates automatically when the wrist is tilted towards the face. Hands featuring a fluorescent Neobrite coating ensure visibility in low-light environments or total darkness.

Flexible strap

Reliable comfort during wear is provided by a black-colored elastic strap featuring a durable metal buckle. The material’s resistance to moisture and perspiration makes it perfectly suited for a wide range of outdoor activities.

5 alarms, calendar, stopwatch, timer, world time function, average speed measurement

Fitted with:

  • 5 independent daily alarms featuring a snooze option
  • advanced perpetual calendar for automatic date management
  • stopwatch function with up to 100-hour duration and 1/1000-second precision
  • countdown timer supporting intervals up to 24 hours
  • world time capability for monitoring multiple time zones
  • average speed calculation across a specified distance

Battery-powered

Powered by a CR1220 battery, the model offers an estimated operational lifespan of 2 years according to the manufacturer.

Main features

  • G-Shock technology
  • Water resistance rated to 200 meters
  • Robust build for maximum durability
  • Automatic LED backlight
  • Hands feature a luminous Neobrite coating
  • Quartz-powered movement
  • Integrated calendar
  • Chronograph stopwatch
  • Countdown timer
  • World time functionality
  • Five independent alarms
Casio


Militaria.pl is a premium dealer of Casio.


Casio is a Japanese brand founded in 1946, which has remained one of the most recognizable consumer electronics manufacturers in the world for decades. It gained global fame with its iconic G-Shock series from the 1980s, valued for its high resistance to shocks, water, and extreme conditions. The company consistently develops its technologies, introducing innovations such as Tough Solar - a solar power system - and Wave Ceptor - radio time synchronization. Casio watches are popular among professionals and people looking for reliable models for everyday use and outdoor activities. The first G-Shock (model DW-5000C), designed in 1983 by engineer Kikuo Ibe, was so durable that it was tested by dropping it from the tenth floor, and yet it still worked flawlessly. Today, Casio is a symbol of innovation, durability, and timeless style.

More Information
Gender Men's
Smartwatch No
Body material Synthetic
Type of mechanism Quartz
Watch power supply Battery CR1220
Strap Plastic
Glass Mineral
Alarm Yes
Date stamp Yes
Dimensions 55 x 51.2 x 16.9 mm
Stopwatch Yes
Backlight Yes
Waterproof 20 ATM / 200 m
Shockproof Yes
NFC No
Calendar Yes
Compass No
GPS No
Barometer No
Thermometer No
Altimeter No
Chronograph No
Pedometer No
Calorie counter No
Heart rate measurement No
Pulse oximeter No
Weight 70 g
EAN 4971850443940
Manufacturer code GA-100 -1A4ER
Brand Casio
Neobrite feature
Neobrite
Neobrite is a luminescent coating used in Casio G-Shock watches, applied to the hands and indices of the watch face. When exposed to daylight or artificial light, it glows in the dark, ensuring good readability at night. It is non-toxic, durable, and does not require battery power.
ISO Standard 764 feature
ISO Standard 764
ISO 764 is an international standard that defines a resistance of a watch to magnetic fields. Watches that comply with this standard must maintain their accuracy after being exposed to a magnetic field of 4800 A/m (approx. 60 Gauss). The standard guarantees that the components of the mechanism will not be permanently magnetized and that the watch will function properly after exposure to typical sources of magnetic fields, such as smartphones, speakers, and electronic equipment.

Reviews with photos

Review summary

Automatically prepared based on reviews

Number of reviews: 14

  1. О... Review confirmed by purchase
    100%

    The watch looks great and fully meets my expectations. It is durable and works flawlessly. Unfortunately, it has one flaw – the red hour hand is hard to see in low light, even with the backlight.

  2. A... Review confirmed by purchase
    100%

    I thought about it for a long time, but in the end I decided to buy it. This is really an original product and in my opinion very comfortable. The downsides for me are: the backlight could be stronger, Kyiv is missing from the list of cities, and the settings are a bit unclear. As for the store, I am very pleased, the package arrived in about five days.

  3. T...
    100%

    The watch performs well in tough conditions. It is shockproof and water resistant up to 200 meters. The analog-digital display looks very good. Modern and robust appearance. Price is adequate for the quality. I recommend it.

  4. A...
    100%

    A rugged watch. I've banged it here and there more than once, and nothing ever happened. Honestly, I only use it to show me the current time and that's it. I consider all those extra features, which I don't use anyway, as unnecessary additions. I would buy it again without hesitation. Great design.

  5. A...
    100%

    A rugged watch. More than once I've hit it against things and nothing happened to it. To be honest, I only use it to check the current time and that's all. The other functions, which I don't use anyway, I consider unnecessary extras. I would buy it again without hesitation. Great design.

  6. B...
    100%

    In my opinion, this is the ideal watch model for the forest and various military activities. The entire outer texture is super durable, it shows everything perfectly and works great.

  7. P... Review confirmed by purchase
    100%

    Casio... what can I say, the brand speaks for itself with a capital 'B'. The watch doesn't let you down, even in tough conditions, whether in sand or water. I am very satisfied with this watch, it looks great and is super durable, I highly recommend it.

  8. C... Review confirmed by purchase
    100%

    I bought it recently and so far I've been pleasantly surprised. First of all, the watch is very clear. Everything is easily visible. The second important thing is water resistance. I wash dishes and shower with it. Besides that, it's very nice looking. Massive, masculine, and yet lightweight. I have a small wrist, and it fits perfectly. A circumference of 16 cm is not a problem here. I highly recommend this purchase, as well as the entire store.

  9. A...
    40%

    A strange decision — fluorescent markers only on the scale. In fact, there's no use at night without backlighting. During the year, the button was repaired under warranty. For some reason, Casio's international warranty is not recognized by our services.

  10. A...
    100%

    A truly masculine watch. The design is just an amazing marvel. Water resistance tested, it works, nothing leaks inside the watch. There is only one big minus: it is hard to figure out all these functions, and there are so many of them. In the end, who needs all that? I bought it only for the looks, and all those fancy features just collect dust because I don't need them. It just needs to show me the time so I don't have to pull my smartphone out of my pocket. For the looks—so masculine, military-tactical, super tough—it deserves ten stars.

  11. M... Review confirmed by purchase
    100%

    Above all, the watch has a great design, it's simply beautiful! Plus, its durability and water resistance. Nice features like alarms, stopwatch, different world times. The backlight is enough to read the time at night. The downside is handling—it takes a while to figure out the options at first, but it's a great watch!

  12. p...
    80%

    The watch is nice, rugged, waterproof, but it has a few flaws: very poor orange LED backlighting, which does not fully illuminate part of the digital display. If you want to see the final result, e.g. from the stopwatch, you have to hold your finger in the middle of the dial so that the light reflects off your finger and is directed onto the display. People with poor eyesight may have trouble reading the display even on sunny days because a so-called negative display is used here. It often happens that, at hours such as x:35 - x:45, you cannot read the display because the large hand covers it. This is irritating enough to make daily use difficult. Overall, the product is definitely worth recommending.

  13. B...
    100%

    I bought it as a gift for my father as a retiree's watch. He is very satisfied; the watch is lightweight, durable, and easy to read.

  14. J...
    100%

    I don't think anyone needs to review Casio as a company. It's a class of its own. Very good quality workmanship.

No reviews

  1. ...