Casio F91W Review: Is It Worth Buying?

The Casio F-91W is still perhaps the most famous watch on the planet, over a long time after its first debut. It has a cult status among people searching for a low-cost, dependable, and accurate wristwatch to use daily. Therefore, this Casio F91W review will show you why it is so popular.


  • Brand: Casio
  • Color: Black
  • Material: Plastic
  • Bandwidth: 20.00 millimeters
  • Case diameter: 37.00 millimeters
  • Case thickness: 10.00 millimeters
  • Display Type: Digital
  • Movement: Quartz
  • Water resistance: 3ATM/100ft

Overall Customers’ Feedback

According to customers, the Casio F-91W is a favorite among military recruits worldwide; it is an inexpensive watch that can withstand hardships.

They’re popular among traders as well because they provide the same life-or-death odds for their trading. The majority of people buy them since they are cheap to the point of being disposable.

Detailed Review Of The Casio F91W

Size & weight

Despite its vintage appeal, this timepiece is not the pinnacle of style. Thanks to its plastic strap, the F-91W places a premium on function above its appearance, which is incredibly pleasant to wear. 

With a weight of roughly 20 g and a 34mm diameter, you’ll forget this item is on your wrist, making it comfortable to wear all day or while sleeping. 


Three stainless steel pushers protrude from tiny cushion-like bulges on the rectangular casing, constructed of black resin, making cycling between the watch’s many settings and functions elementary and straightforward. 

While the case isn’t made of more desired stainless steel, it nevertheless protects your watch from scrapes and bumps. Moreover, with less than $20, you can’t ask for much more. The case-back is made of stainless steel and is held in place by four tiny screws. 

The center of the case-back has some written information about the product. A primary Casio quartz mechanism is included within, which has shown to be reasonably reliable and sturdy over the years. 

This one makes no audible noise, and its battery lasts for at least 7 years. The case’s size, in particular, makes it suitable for a wide range of wrist sizes. Most thinner Casio designs are slightly more adaptable and elegant, as well as fitting undersleeves more readily.

Water resistance

A “WR” emblem is imprinted across the base of its face, bordered by the words “Water Resist.” This characteristic is comparable to the 30m water-resistance or 3ATM/100ft rating that most watches employ to signal that they are not suitable for showering, swimming, or other activities.


The Casio F-91W is an amazingly dependable timekeeper that surpasses expensive mechanical watches in nearly every parameter. Moreover, it costs almost nothing as a gumball machine.

The most precise mechanical timepieces, which cost well over $100,000, are precise to within 2 seconds every day. 

The ordinary quartz watch, such as this Casio F91W, is correct to within 1 second every day, which Casio promises for the F91W. It is more reliable than someone expecting to get a model for under $20 could anticipate.

This plastic watch is arguably the best example of how plastic-cased, mass-produced, battery-powered quartz timepieces have nearly ruined the traditional Swiss mechanical movement industry.

The battery life is listed as 7 years, although some customers say it is closer to 10. It is powered by a tried-and-true CR2016 battery, which is simple to find on the market. 

Overall, it deserves some recognition for what it delivers at such a low price — and it takes the rest of the wristwatch industry in perspective.


There is a shatter-resistant acrylic “window lens” or “crystal” on the front. The lens gives the LCD screen outstanding clarity, making it utterly viewable from any angle, even under the direct sun.


The dial-in case is a crystal-clear LCD that can be seen from various angles, even in bright sunshine. A shock-resistant acrylic lens protects this. It’s worth noting that this isn’t scratch-proof, which will show nicks and scrapes. 

However, with the watch’s price, you may consider this a non-factor. The backlight is not outstanding; however, it does work in some ways. It dimly glows from the left side of the screen, allowing you to read the time even in complete darkness.


Its resin strap does not seem particularly enticing; after all, what can you expect from an affordable watch? In actuality, though, this is the ideal complement to this rugged timepiece. 

It is soft, comfy, and thin, and it blends in well with the watch’s design. It’s perfect for usage during activity because it does not retain hair and seems unaffected by perspiration; its simple design also guarantees it does not get in the way and lowers the risk of injury.

Other special features

Casio has also added a devious technique for determining whether or not your watch is authentic, which is the word “Casio” on the screen. First, push all of the buttons simultaneously to display all of the numerals, then press and hold the lower right button for about 5 seconds to see “Casio.” 

You can rely on the instructions in this video to better understand how to do so.

Pros & Cons Of The Casio F91-W Watch


  • Affordable price tag
  • Perfect for vintage or geek chic enthusiasts
  • Disgustingly high legibility
  • Slim, lightweight, with a conforming band
  • Durable
  • Easy to use


  • Inadequate backlight
  • Not as elegant appearance as others
  • Too basic specifications


1. How water-resistant is the Casio F91W?

The Casio F91W is advertised to be water-resistant to “30 meters,” which in ISO terms implies it’s just suitable for rain and splashes. However, some investigation revealed that it is capable of far more than weather resistance. 

Moreover, an O-ring rubber seal on the buttons allows them to move inside the casing without letting water leak in. 

The watch is considerably more reliable than on paper. However, if that isn’t enough, you can alter the watch to increase its waterproofing even further.

2. Timex vs. Casio: Which is better?

Casio comes out on top when it comes to cost, durability, diving, and sports timepieces. Furthermore, their retro digital timepieces (such as the F91W) are great throwbacks to the past. 

Therefore, in the Timex vs. Casio battle, Casio emerges victoriously. On Amazon, you can discover a wide range of Casio watches that are both inexpensive and long-lasting.

3. Why do many terrorists wear Casio watches?

Terrorists selected the Casio F91W as timers in improvised explosives because of its design and availability. In addition, the CIA regarded ownership of the watch to be an identification for their ‘terrorism watch list.’


Hopefully, this Casio F91W review is beneficial to you. Although this watch prioritizes the function above its form, we believe the F-91W is an absolute must-have. 

There are numerous reasons why this Casio watch has legendary status, whether as a first wristwatch or as an affordable daily timekeeper. Moreover, the Casio F91W watch is less expensive and has a more pleasant strap, so many will undoubtedly prefer it.

Last Updated on May 3, 2022 by The o.d.m team

5/5 - (2 votes)