Casio G-Shock GA-2100-1A1ER analogue-digital black Watch
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- 100% secure payment
- Free returns in store
- With a 3 year warranty
- Free shipping on orders over €75
- Payment in installments available
- Do you have any questions? Contact us
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Details
Details
This Casio watch for men stands out for its robust design and dual functionality. It features a 45 mm black resin case and a resin strap that ensure comfort and durability. The dial combines an analogue-digital design in an elegant black colour, making it easy to read the time thanks to its stick format numbers. Among its features, it includes an alarm system, automatic calendar, and a 12/24 hour indicator, along with a world time function that allows for the display of time in different time zones. Additionally, it has a stopwatch with precision to a hundredth of a second, a timer, and an LED light for ease of use in low-light conditions. This model is powered by a battery with a lifespan of up to 3 years and is water resistant to 200 metres, making it ideal for water activities. A versatile watch that combines style and functionality for the contemporary man.
Ref. GA-2100-1A1ER
Jewelry care
Jewelry care
To preserve the luster of your jewelry, it's recommended to avoid using cosmetics, cleaning products, and other chemical agents, and to clean it with a soft cloth. For professional cleaning, please visit one of our jewelry stores.
Exchanges and returns
Exchanges and returns
The return or withdrawal period is 15 days and the exchange period is 30 days, both from the date of delivery of the item.
Shipping and delivery
Shipping and delivery
Size guide
Don't know your ring size? We'll show you different ways to find the perfect size.
The size is the measurement of the ring's interior space.


How to measure your ring size at home: step-by-step guide
Method 1: Measuring an existing ring (inside diameter)
This is the most accurate method if you already have a reference ring. Follow these steps:
- You will need the ring and a ruler.
- Do not include the metal; the thickness is not considered for the measurement.
- Note the exact measurement in millimeters (mm) and look for this figure in our equivalence table, in the "Inside diameter" column.

Method 2: Measuring your finger (circumference)
If you don't have a reference ring, you can measure your finger's circumference. Follow these steps:
- You will need a string, a measuring tape, or a strip of paper and a ruler.
- We recommend measuring your finger at the end of the day to avoid swelling.
- Wrap the string, tape, or paper strip around the base of the finger on which you will wear the ring, note the exact measurement, and find it in our equivalence table.

Equivalence table
| Ring inside diameter (mm) | JOSE LUIS Joyerías Size |
|---|---|
| 15.2 mm | 8 |
| 15.5 mm | 9 |
| 15.9 mm | 10 |
| 16.2 mm | 11 |
| 16.5 mm | 12 |
| 16.8 mm | 13 |
| 17.1 mm | 14 |
| 17.4 mm | 15 |
| 17.8 mm | 16 |
| 18.0 mm | 17 |
| 18.4 mm | 18 |
| 18.7 mm | 19 |
| 19.0 mm | 20 |
| 19.3 mm | 21 |
| 19.6 mm | 22 |
| 20.0 mm | 23 |
| 20.3 mm | 24 |
You can also consult our customer service team for more information.