The Casio G-SHOCK Octagon GMA-P2100BB-1AER women's watch is the perfect combination of functionality and style that will work perfectly in any situation. It features a modern, all-black design that complements its durable, shock-resistant plastic construction. The CASIO 5730 Japanese quartz movement, hidden inside the watch, offers functions such as world time, an expanded calendar and 5 daily alarms, making it a practical everyday companion. The digital display on the black dial ensures legibility, while the Super Illuminator makes it easy to read the time even in low-light conditions. With a water resistance of 200 meters and functions such as stopwatch, timer and Mute, this watch is both stylish and extremely versatile, ideal for women with active lifestyles.
Functions
LED light
A light-emitting diode (LED) is used to illuminate the watch face.
Shock-resistant
Shock-resistant construction protects against impact and vibration.
World time function
Displays the current time in major cities and specific areas around the world.
Stopwatch function - 1/100 sec. - 24 hours
Accuracy of measurement up to 1/100 of a second, measuring range up to 24 hours.
Timer - 1/1 sec. - 24 hours
For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. They The time can be set to the nearest second and up to 24 hours in advance.
5 daily alarms
The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.
Button tones on/off
The button tones for using the mode button can be turned off. This means that the watch no longer beeps when switching from one function to another. Preset alarm or countdown timers remain active when the button tones are deactivated.
Hand Moving Function
With a push of a button, hands are moving and permit a free visibility of functions like stopwatch or date.
Automatic calendar with Date, Day and Month
Once set, the automatic calendar always displays the correct date.
12/24-hour timekeeping
Times can be displayed in either a 12-hour or 24-hour format.
Mineral glass
The tough mineral glass resists damages.
Folding clasp
The watch has a folding clasp.
3 Years - 1 Battery
The battery supplies the watch with sufficient energy for approx. three years.
Water resistance classification (20 bar)
Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810.
What’s in the box?
3-year warranty
User manual
Warranty card
Casio box
Reviews about G-SHOCK Octagon GMA-P2100BB-1AER (5)
This model is a must-have for anyone who loves a sporty style but is looking for something more subtle than classic men's G-Shocks. The all-black, matte design gives the watch a very modern look and pairs well even with more casual outfits without being too flashy. The biggest advantage for me is its slimness—at just 11 mm thick, the watch sits perfectly on a woman’s wrist and doesn’t snag on clothes, which is a huge plus for this brand. Despite its smaller size, it still offers rugged shock resistance and water resistance up to 200 meters, so I literally never have to take it off, not even at the pool or during an intense workout. It’s the perfect combination of minimalist aesthetics and legendary durability, giving me a sense of complete freedom in any situation.
Lussie
3/6/26
100%
I was looking for a watch that would be durable but wouldn’t weigh down my wrist. This model is a perfect fit—it’s 40 mm wide, so it fits a woman’s wrist perfectly. The all-black design looks amazing and goes with literally everything, from a sports sweatshirt to more casual outfits. I really appreciate that it’s lightweight and shock-resistant, so I don’t have to worry about it during activities. The Zegarownia store did a great job; the package arrived in no time. I highly recommend it to anyone looking for a stylish, smaller-sized G-SHOCK.
Brie
2/16/26
100%
No problems, fast delivery.
BasiQ
1/15/26
100%
I bought this women's watch as a birthday gift for my mom. It looks great and goes with any outfit. I'm happy with my choice. I recommend this store.
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The administrator of your personal data is the owner of the Watchard store, i.e. 57 Concepts Sp. z o.o. Sp. k. with the registered office at al. Witosa 31, lok. 115, 00-710 Warsaw, Poland. Providing personal data by the Customer is voluntary but necessary to complete the purchase. You have the right to view your personal data we have processed, as well as the right to request changes or removal of your personal data. Personal data will be processed for a period of 10 years.
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The administrator of your personal data is the owner of the Watchard store, i.e. 57 Concepts Sp. z o.o. Sp. k. with the registered office at al. Witosa 31, lok. 115, 00-710 Warsaw, Poland. Providing personal data by the Customer is voluntary but necessary to complete the purchase. You have the right to view your personal data we have processed, as well as the right to request changes or removal of your personal data. Personal data will be processed for a period of 10 years.
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