A watch the size of a ring, a ring with watch functions: that is the new Casio Ring Watch CRW-001G-9ER. An entirely new style of digital watch – practical and playful at the same time – made possible by a miniature module and advanced metalworking technology.
Creating an all-metal, ring-sized version of a Casio watch with a complex shape is no easy task. To achieve this, Casio used a special metalworking method, injecting a mixture of fine metal powders and resin into a mould. Using metal injection moulding (MIM), the case, case back and ring are moulded as a single piece. The classic design of the Casio G-Shock watch strap has also been faithfully reproduced on the ring band. A special crystal bonding technique provides a durable seal, giving the watch basic water resistance. The ring watch also allows the battery to be replaced.
The ring has an internal diameter of 20 mm and a circumference of 62,8 mm. It is suitable for a finger size of 20,5 EU (22 JP, 10,5 US, U UK).
The package includes two size-adjustment inserts. These can be used to adjust the size to:
19,5 EU (19 JP, 9,5 US, T UK) (internal diameter 19 mm)
18,2 EU (16 JP, 8 US, Q UK) (internal diameter 18 mm).
The miniature watch module is powered by a small button battery and housed in a case that can be operated using three buttons on the sides. The result is a digital watch that fits on your finger.
Despite its small size, the watch has a 7-segment LCD display showing the time, date, day of the week, dual time, stopwatch, alarm and 12/24-hour format. It also features LED illumination for the display. The watch has an automatic calendar (February with 28 days), so there is no need to adjust it over time.
It also has a practical display illumination function when the alarm is activated.
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| Brand | Casio |
| Gender | Male, Female, Unisex |
| Style | Sports, Casual |
| Origin | Japanese |
| Guarantee | 5 years |
| Waterproof | Water resistant |
| Weight | 16 g |
| Movement | Quartz |
| Caliber | 3573 |
| Movement accuracy in seconds | ±30 sec. / month |
Stopwatch measurement accuracy ![]() |
1/100 sec. |
| Case size | 25,2 × 19,5 mm |
| Case height | 6,2 mm |
| Case shape | Square |
| Case material | Steel with PVD treatment |
| Case color | Gold |
| Crystal material | Mineral |
| Dial | Digital |
| Dial color | Black, gold |
Transparent Case ![]() |
No |
| Strap material | Stainless steel with PVD treatment |
| Strap color | Gold |
Quick release system ![]() |
no |
Alarm clock ![]() |
Yes |
| Date | Yes |
| Backlight | Yes |
Stopwatch ![]() |
Yes |
Day of the week indicator ![]() |
Yes |
| Functions | Date, Day of the week, Stopwatch, Alarm clock, Automatic calendar |
| Battery | Yes |
| Other functions | Režim 12/24, Automatický kalendář, Hodinový sígnál, Stopky, Rozsvícení displeje při alarmu ad. |
We guarantee the accuracy of the data. Did you find a mistake? Let us know and get 8 EUR on Watch purchase.
Guarantor: Kateřina Žváček
Jiří Štencek
+420 252 252 306
Mo-Th 9-19
Fr-Sa 9-16
info@helveti.eu
The product is included in categories
Ladies dress watch Ladies Steel Watches Men's best-selling watches Men's dress watches Men's gold watches Men's steel watches Men's watches with stopwatch Women's best-selling watches Women's gold watches Ladies Japan Watches Ladies sports watch Men's Japanese watch Men's Quartz watches Men's sports watches Men's watches under 200 EUR Men's watches with date Women's Quartz watches Women's watches under 200 EUR Men's black watches Men's watches under 400 EUR Men's watches with alarm Women's watches under 400 EUR Women's watches Casio Unisex Watches Classic Collection Classic Collection Men’s watches Casio Classic Collection Women's watches with alarm Women's watches with date Women's watches with stopwatch Men's watches with steel bracelet Women's watches with steel bracelet Men’s Watches Casio Watch gift for men Watch gift for woman Men's watch with mineral glass Women's watch with mineral glass
Casio, Japan is one of the best-selling watch brands in the world. The first watches from the Casia workshop were digital and at the same time the first in the world to display the date. Casio's digital watches are no longer popular today, although analog watches or watches with a combined time display already form a large part of the range.
Casio has made history with its range of super-durable G-Shock watches, which are equipped with a light but sufficiently durable construction (against falls of up to 10 m, shocks, vibrations, magnetic field and temperature fluctuations) and a great value for money. The glory of the G-Shock watch over time also required a lightweight women's version - Baby-G. The Casio Pro Trek or Casio Edifice outdoor watches are also very popular. Casio does not lag behind in modern technology either, as evidenced by models equipped with Bluetooth technology, the Tough Solar solar drive or the high-precision radio-controlled Wave Ceptor watch.
Helveti.eu is an authorized dealer and specialist of the Casio brand.
Manufacturer information: CASIO Europe GmbH, Casio-Platz 1 D-22848 Norderstedt, Germany / info@casio.de
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1 → We check, clean and set
We will check the functionality, set time, date and clean the watch carefully.
2 → We will carefully pack the watch
So that the watch does not have a chance to be damaged. We use special vacuum pads.
3 → We insure the watch against damage from the carrier
To be sure, we will insure the watch against breakage, so there is nothing to fear.
With each watch, you will receive a gift of your choice from us. Gifts are graduated according to the value of the order.
From €0 = Cleaning cloth, with which you can polish the glass of a watch.
From €100 = Stroke shortener, you can adjust the watch bracelet to your hand.
From €150 = Helveti canvas bag.
From €150 = Credit card knife.
From €170 = Donut watch case.
From €400 = Parker Jotter.
From €600 = knife Mikov 100-NH-2A blue.
From €1000 = Victorinox Waiter knife with 9 functions.
From €1400 = Watchroll for 2pcs.
From €1650 = Helveti leather watch roll.
From €2000 = Leather travel case.
From €2800 = Leatherman REV.
From €4000 = Wooden watch box Helveti.
From €6000 = Watch winder Helveti black.
And on top of that, a 5-year warranty (You can find the terms of the extended warranty here) and free shipping.
You can view the gifts here: