Casio W59 Vs F91: Detailed Comparison For Watch Fans

It’s no surprise that many Casio models look and function pretty similarly. Thus, it’s relatively tricky to distinguish models from models. An apparent example of this is the Casio W59 vs F91, as these two are somewhat identical. 

If you’re wondering between these two models and don’t know which one to choose, today’s detailed comparison might be what you need. Keep on reading.


These watches both utilize quartz movements and are pretty similar when it comes to precision. These timepieces feature a monthly inaccuracy of just +/- 30 secs. 

Also, the battery life expectancy of these two models is identical. Most of the time, you can expect a 7-year battery life with both the F91 and W-59. Although both wristwatches perform similarly, they still boast a few differences.

The very first thing appears to be the waterproof level. Casio says that the W59 outperforms the F91, which previously proved to function better than the F91’s 30m mark.

Indeed, the Casio W59 boasts a higher grade of 5 bars (equal to 50m), which could provide more trustworthy underwater endurance. But, surprisingly, it is still reliant on the original 4 screw case-backs to do this; thus, any improvements must take the shape of new sealants.

However, despite the excellent claimed grade, utilizing the controls while submerged may potentially damage the sealant.

Although waterproofing isn’t a significant drawback for the F91, the awful backlighting is. In any lighting apart from complete darkness, it is difficult to see the numbers.

And there isn’t much of an improvement when it comes to the W-59. This watch features a mediocre side-light that functions just slightly better than the F91.



According to the manufacturer, the Casio F91 is 3.54 x 13.39 x 15.35 inches and weighs only 0.71 ounces, which is pretty lightweight and compact. On the other hand, the W59 is a bit heavier with slimmer dimensions. Indeed, it measures 2.36 x 4.09 x 3.86 inches and weighs 1.06 ounces.

There is a slight difference when it comes to the weight of the 2 models.

Casio F91, introduced in 1991, possesses a unique case, which might be the most distinguishing feature between F91 and W59.

Its case measures longer from lug to lug. At the same time, the device follows the design of legendary high-end watch casings that arrived before it. 

Indeed, like the Philippe Dufour Grande et Petite Sonnerie and Rolex Datejust Thunderbird, it extends beyond the node of the bands, creating a graceful angle that bridges the opening that would typically remain.

Even though the Casio W-59 sports a similar appearance, it boasts a narrower casing (from lug to lug) that does not possess the signature F91’s angle above the intersection of its casing and wristbands.

Despite the differences, there wouldn’t be a significant difference when it comes to users’ experience. On the wrist, they feel almost the same.


The W-59 is the most aesthetically comparable to the F91. This one boasts a matching form and nearly exact color combination, with only slight changes. 

Indeed, if you’re looking for an F91 featuring larger, easier-to-press controls, W59 timepieces are the best choice. They have the same compact design, ultra-lightweight casing, and clear buzzer sound.

Moreover, it’s a little deeper and features more traditional-styled lugs. However, most customers wouldn’t recognize the distinction at first sight. 

The design of the W59 is also a bit different.

But those are not the only differences regarding the design of W59 and F91. The style also plays a significant role. With its azure frame and reddish letters on the screen, the W59 variant has a unique late-1980s design, different from the signature 90s look of the F91W. 

In other words, it would appear far prettier on a NATO band than its successor, the F-91W. The W-59 band features perforations on the tang closure end that, in addition to appearing cooler, aid in airflow and drying, which is pretty noticeable.

Additional Features

When it comes to features, there aren’t any differences between these two models. In detail:

Both the W59 and F91 are extremely accurate timepieces with a stopwatch that can tally up to 59:59.99 seconds (around a minute). This stopwatch likewise enables us to record the entire duration (total + rest minutes) (lap).

An hourly clock alarm, a single daily notification lasting 20 seconds, and an annual organizer are also included, albeit there is no feature for leap years owing to the products’ inability to identify the leap year. This means the month of February is always counted as 28 days in these watches.

Moreover, the devices both boast 12-hour and 24-hour formats, helping to match any clock reading style you’re used to.


Both products are highly reasonable and won’t cost you an arm and a leg regarding the price. Yet, there is still a small price gap between these two models. On Casio’s website, the F91 is priced at $18.95, while the W59 is at $24.95. This price difference might come from the better water resistance of the W59.


Now you spot the similarities and differences between the Casio W59 vs F91. Hopefully, you’ve gained a more insightful look at these 2 wonderful models and decided on the perfect one for yourself. Good luck!

Last Updated on January 21, 2022 by The o.d.m team

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