Quick answer: The Casio F-91W is the classic Casio digital watch, first released in 1989 and now the best-selling watch in the world. A genuine Casio F-91W in the UAE costs under AED 100: the blue Casio F-91WS-2 is AED 91 at IN TIME TRAIDING LLC in Dubai. It weighs just 21 g, has a stopwatch, daily alarm, hourly chime and LED light, and its battery lasts about 7 years. It is splash resistant, but not made for swimming.
What is the Casio F-91W?
The Casio F-91W is a simple, square digital watch with a resin case and strap. It was designed by Ryusuke Moriai and launched in June 1989, and Casio still makes it today almost unchanged. Around 100 million have been produced, which makes it the most-sold watch ever made.
Searches for the Casio F-91W in the UAE have grown more than fourfold in the last year. It is popular with students, gym-goers, workers, collectors and fashion fans alike, because it costs very little, lasts for years and suits almost any outfit.
Casio F-91W specifications
| Feature | Casio F-91W |
|---|---|
| Size | 38.2 × 35.2 × 8.5 mm |
| Weight | 21 g |
| Case and strap | Resin, with a stainless steel caseback |
| Display | Digital LCD with hours, minutes, seconds, day and date |
| Movement | Casio quartz (module 593), accurate to about ±30 seconds per month |
| Battery | CR2016, about 7 years |
| Stopwatch | 1/100 second, up to 59:59.99, with split time |
| Alarm | Daily alarm and hourly time signal (chime) |
| Light | LED light |
| Time format | 12-hour or 24-hour |
| Water resistance | Water resistant (splash and rain), not for swimming |
Casio F-91W price in UAE
A genuine Casio F-91W in the UAE usually costs under AED 100. At IN TIME TRAIDING LLC, the Casio F-91WS-2 in blue is AED 91, including VAT. You can order online with cash on delivery and AED 15 delivery to all seven emirates, or pick it up for free at our stores in Al Ghurair Centre and Ibn Battuta Mall.
If you see an F-91W for far less than this, especially from an unknown seller, be careful. The F-91W is one of the most copied watches in the world.
Casio F-91W colours and versions
All versions use the same module and functions. Only the colours and finish change:
- F-91W-1: the original black version with the blue and red details.
- F-91WS: colour editions in softer, translucent tones, such as the F-91WS-2 in blue.
- F-91WG-9: black with gold details.
- F-91WC: bright neon colours on the case, face and strap.
- F-91WM: a metallic-colour case on a black strap.
Looking for a specific colour? Message us on WhatsApp at +971 52 866 0100 to check what is in our Dubai stores.
Original vs fake Casio F-91W: how to tell
Because the F-91W is so cheap and famous, fakes are common online. A genuine Casio F-91W has these signs:
- Clear printing. The words around the display, such as “ALARM CHRONOGRAPH” and “WATER RESIST”, are sharp and evenly printed. On fakes they are often faint, blurry or misspelled.
- A readable screen at an angle. On a genuine watch you can still read the time when you tilt it. Many fakes fade to shadows.
- “CASIO” on the screen. On newer genuine models with the green LED light, holding the right button for about 3 seconds in time mode shows “CASIo” on the display.
- A clean caseback. The steel caseback shows “593” (the module number), and the screws are blunt, not pointed.
- A smooth strap. Genuine straps have no rough plastic tags or mould lines.
- A normal beep and good timekeeping. Fakes often beep louder and higher, and lose or gain time quickly.
The easiest way to be sure is to buy from a trusted shop. Every watch at IN TIME TRAIDING LLC is 100% genuine, and you can see it in person at our Dubai stores before you buy. For more tips, see our guide to buying genuine Casio in Dubai.
How to set the time on a Casio F-91W
The F-91W has three buttons: L (top left, light), C (bottom left, mode) and A (right).
- Press C three times to reach time-setting mode. The seconds will flash.
- Press A to reset the seconds to 00.
- Press L to move to the next setting: hour, minute, month, date, then day of the week.
- Press A to change the flashing value.
- Press C to go back to the normal time display.
12-hour or 24-hour: in the normal time display, press A to switch between 12-hour and 24-hour time.
Alarm and chime: press C once to reach alarm mode. Press A to turn the alarm and the hourly chime on or off. To set the alarm time, press L so the hour flashes, use A to change it, press L again for minutes, then press C to finish.
Stopwatch: press C twice to reach the stopwatch. Press A to start and stop, and L for split time or to reset.
Is the Casio F-91W waterproof?
No. The F-91W is water resistant, which means it handles rain, sweat and splashes when you wash your hands. It is not made for swimming, showering or diving. If you want a cheap Casio digital you can swim with, choose the Casio W-800H-2A (100 m water resistance, AED 96) or the Casio W-218HC-8A (50 m, AED 86). Learn more in our water resistance guide.
Is the Casio F-91W worth buying?
Yes, if you want a light, reliable and affordable everyday watch.
- Pros: very low price, only 21 g, 7-year battery, accurate, easy to read, and a design that has stayed in fashion for over 35 years.
- Cons: not for swimming, the LED light is quite dim, the resin strap can wear out after a few years, and the calendar does not know leap years.
It also makes a great low-cost gift. See more ideas in our Casio watches under AED 100 guide.
Casio F-91W alternatives in UAE
Like the F-91W look but want steel, more water resistance or a different style? These genuine Casio digitals are in stock in Dubai:
| Watch | Why choose it | Price (AED) |
|---|---|---|
| Casio A158WA-1D | The F-91W style on a silver steel bracelet | 81 |
| Casio W-218HC-8A | Retro square look, 50 m water resistance | 86 |
| Casio A159WA-N1 | Slim steel retro digital | 94 |
| Casio W-800H-2A | Sporty, 100 m water resistance, 10-year battery | 96 |
| Casio CA-53WB-1B | The famous calculator watch | 112 |
| Casio A168WA-8A | Steel retro with a brighter backlight | 122 |
| Casio AE-1200WHD-1A | World time map, 100 m water resistance | 185 |
| Casio LA680WEGV-9A | Petite gold-tone digital for women | 244 |
Compare more retro models in our Casio vintage watch guide, or read digital vs analog watches to choose the right style.
Where to buy a genuine Casio F-91W in Dubai
Buy the Casio F-91W online at IN TIME TRAIDING LLC with cash on delivery and AED 15 delivery to all seven emirates (1–2 working days in Dubai, 2–4 days to other emirates), or visit our stores at Al Ghurair Centre (1st Floor, in front of Adidas) and Ibn Battuta Mall (Ground Floor, in front of Centrepoint), open Monday to Saturday, 10 am to 6 pm. Browse all Casio watches, or join our 11.11 watch sale from 1 to 11 November.
Frequently asked questions
How much is a Casio F-91W in UAE?
A genuine Casio F-91W in the UAE usually costs under AED 100. The Casio F-91WS-2 is AED 91 at IN TIME TRAIDING LLC in Dubai, including VAT.
Is the Casio F-91W original if it is very cheap?
Not always. The F-91W is widely copied. Check for sharp printing, a screen that stays readable at an angle, “593” on the caseback and a smooth strap, or buy from a trusted shop that sells only genuine watches.
Can I swim with a Casio F-91W?
No. The F-91W is only splash resistant. For swimming, choose a Casio with 50 m or 100 m water resistance, such as the W-218H or W-800H.
How long does the Casio F-91W battery last?
The F-91W uses a CR2016 battery that lasts about 7 years with normal use. Using the light and alarm often makes it run out sooner.
How do I change a Casio F-91W to 24-hour time?
In the normal time display, press the right button (A). The watch switches between 12-hour and 24-hour time each time you press it.
Is the Casio F-91W good for men and women?
Yes. The F-91W is unisex. Its 35 mm wide case suits both men’s and women’s wrists, and the strap fits most wrist sizes.
