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⌚ Classic meets cutting-edge: Stay sharp, stay ahead.
The Casio F91W Series is a lightweight, water-resistant digital watch featuring a precise quartz movement, 1/100 second stopwatch, daily alarm, and an LED backlight. With a durable resin case and an impressive 7-year battery life, it offers timeless style and reliable functionality for professionals who value simplicity and endurance.






| ASIN | B01N7XKNSX |
| Additional Features | Alarm, Water Resistant |
| Age Range Description | Adult |
| Band Color | Black |
| Band Length | 8.75 inches |
| Band Material Type | Resin |
| Band Width | 18 millimeters |
| Bands | 1 |
| Best Sellers Rank | #314 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1 in Men's Wrist Watches |
| Bezel Color | Black |
| Brand Name | Casio |
| Case Diameter | 33 millimeters |
| Case Material Type | Resin |
| Case Thickness | 35.2 millimeters |
| Character | Fashion |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | mineral |
| Customer Reviews | 4.6 out of 5 stars 2,236 Reviews |
| Dial Color | Gray |
| Display | Digital |
| Embellishment Feature | Crystal |
| Face Style | Digital |
| Included Components | Quartz Movement, Resin Band, Brand's Case |
| Item Type Name | Watch |
| Item Weight | 0.09 kg |
| Manufacturer | Casio |
| Manufacturer Part Number | F-91WM-7ADF |
| Material | Resin |
| Model Name | F-91WM-7ACF |
| Model Number | F-91WM-7ACF |
| Model Series | 91 |
| Number of Items | 1 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Series Number | 91 |
| Shape | rectangle |
| Sport Type | Walking |
| Strap Type | Two Piece Strap |
| Style Name | F91WM-7A |
| Theme | Sports |
| UPC | 889232140780 |
| Unit Count | 1 count |
| Warranty Type | Manufacturer |
| Watch Movement Type | Quartz |
| Water Resistance Level | Water Resistant |
M**7
Perfect for Learning to Tell Time
Classic watch will never go out of style. For this price, the durability and functions are unbeatable!!! I have one (in gold 😉) and I got this one for my kindergartener. You can see the date and day of the week and it also has a timer. He picked out this colorway himself and feels like a big kid. I wanted him to get used to date/time, elapsed time, etc., and this was a really fun way to do it.
C**J
My favorite EDC watch
This iconic little timepiece proves that reliable functionality never goes out of style. Don't let the modest price tag fool you - the F91W is a masterclass in practical design that has rightfully earned its cult following. The display is crisp and easily readable in most conditions, with the LED backlight providing just enough illumination for those midnight time checks. The button layout becomes second nature quickly, making it easy to access the surprisingly comprehensive feature set. The stopwatch has served me well for everything from cooking to workouts, while the daily alarm has never failed to wake me up. The slim profile and lightweight design mean you'll often forget you're wearing it until you need it. What's particularly impressive is its durability. Despite the plastic construction, it handles daily wear and tear like a champ. The water resistance has protected it through countless hand washes and unexpected rain showers. The 7-year battery life isn't just marketing - these things really do run forever on a single battery. Sure, it's not going to win any luxury fashion awards, but that's entirely missing the point. This watch embodies the beautiful intersection of functionality, reliability, and simplicity. Whether you're using it as a trusty backup, a gym companion, or your daily driver, the F91W just works. It's a refreshing reminder that some designs are simply timeless.
D**.
Great
Seems delicate but idk yet. Lights up good and has a minimalist look to it. I like it. Came packaged great with nothing missing. No complaints.
A**X
Best everyday watch!
I got this watch after I found my older Casio watch and bought it back from the dead from sitting in a drawer for 10 plus years. The readability of these watches are amazing! The newer watch will be my everyday watch and the older one will be my beater watch for when I’m working outside or swimming. These types of watches are great for your first watch or just an everyday watch if like me want to go away from the smart watches. The only negative thing that I don’t like about this model is that the backlight is less to be desired. But that is on me for not doing enough research on this model. But all in all, I will definitely wear this watch and I’m pretty sure I’ll buy another one that has better backlighting in the future!
P**I
Love this watch but consider changing the bands
This watch is amazing, Casio delivers amazing solid, reliable quality with this watch and I’ve used it in many different cases and situations. My only gripe is that the bands will rip over time especially when you remove and put on the watch a lot. The light doesn’t illuminate the entire face of the watch but it gives you enough light to tell the time. It looks great and sleek and is a great size and fit for my wrist. I love the color I got but please if anyone reads this consider changing the bands or having nylon bands as a backup because these resin bands will break eventually. Also if you do change the bands please be mindful of how the pins enter and exit the slots and keep the original pins when changing the bands
T**A
Lo recomiendo
Un regalito me encantó muy práctico
J**Z
Casio
Nice
C**D
Decent with quirks
I've been in the market for a new watch because my old band just broke in two and you can't buy bands very easily anymore. And these Casio watchbands have a different shape (posts are narrower than the band), so it's easier to just replace the watch. There are a number of these Casio watches that would appear to be the same except for the color. There are, however, slight differences. This one (F-91WM-7ACF / silver) and the black one (EAW-F-91W-1 Sport watch, ASIN B000GAWSDG ) are 33 mm in diameter instead of 35.5 mm. They also have an 18 mm band, whereas the others (F-91WM-3ACF [green], ASIN B07BQXXNQY, and F-91WM-1BCF [grey], ASIN B07C9F8XLL) supposedly have a 19.25 mm band (though I've had the green one & the band says "18 mm" on it). The thickness of the silver & black ones is also only 8 mm vs. 8.38 on the other two. Oddly, those slight variations make a difference. I find this silver one to fit better and be more comfortable. The band is also just a tad shorter, which works perfectly for me. It must make the holes a better fit for the circumference of my wrist. Frequently, watches sit a little to the outside on my wrist instead of centered. This one centers nicely and is, therefore, more comfortable. I forget it's there. That being said, this watch does have room for improvement. The light (as with any non-Indiglo [Timex], apparently) is a joke. It literally lights up the leftmost 25% or so of the face - all of one character. I don't find that particularly useful. (Something to keep in mind if you're planning on a late night burglary or something & need to synchronize your watch with someone else's - you won't be able to see it in the dark, which could spoil the whole job!) It also has a knack for switching modes. The right button switches between 12-hr & 24-hr modes. (At least it's easier to do than some.) Trouble is, half the time, I look down & it's military time. I don't know how it keeps getting bumped. (At least I'm assuming that's what's happening.) It's a bit annoying. (I guess it's teaching me to think in military time.) It was super easy to set, initially. I didn't need the manual. However, if you download a pdf version of the manual from their site, you might want to rename it. I've got a couple of different ones & the model names don't match the watch. The functionality should be the same, but they reference the buttons by different names. (A-B-C vs L-C-A - why?) The manual itself is a bit of joke. This thing has suddenly taken to beeping (nothing set to beep) and I can't find anything to stop it. The stopwatch isn't intuitive to clear. And the instructions in the manual didn't work. But, leaving it displaying a stopped stopwatch for several minutes did finally clear it. So, it's a bit annoying, but it was cheap. So, it'll do. I still prefer the older Timexes. They used to be really good watches, but they've declined in recent years. So, I can't see paying 2-3x more to maybe just get the Indiglo feature, other things being relatively equal. So, we'll see how this holds up.
M**D
Best quality
Classic one ❤️
S**A
Classic look, light and comfortable, excellent value.
I’m a big guy, 6’ 2” and 220lb. Still, I dislike the awkward bulk of most current men’s watches. It’s not just the large, 40-odd millimeter faces, it’s the absurd thickness and hiking boot styling on the sport watches. This one has a nice understated look. Doesn’t pull the hair on my wrist or get in my way. This watch is perfect, especially at less than a quarter of what I would normally pay for a wristwatch. The display is clear, and adjusting the date is easier than on most analog watches. The illumination isn’t super bright, but it’s good enough- even for my ageing eyes.
M**Y
clasicazo
como en los antiguos la luz no ilumina y se funde, pero que queréis? es un casio, da la hora y el día, una maravilla.
B**N
Très légère
Ensemble très léger . Peut être trop léger, ou est le metal ? surement sur les boutons mais pour le reste, je cherche encore.
1**3
さらに安いのがあった。
品物はとても良いです。軽くてシンプル。 ですが、購入後に地元のホームセンターで2000円を切る値段で売られていたので、まずはスーパーやホームセンターなどを見てみるのが良いかと思いました。
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