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Casio

Casio F91W Series | Digital Watch | Water Resistant | LED Light | 1/100 SEC Stopwatch | Regular Time Keeping (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery

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Availability: Only 3 left in stock, order soon!
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Arrives Oct 20 – Oct 21
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Color: Black


Style: F-91W-1


Description

Designed for comfort and simplicity, the F91W combines essential features with long-lasting performance — a trusted choice for everyday use. A timeless look that works with anything, any day. A lighter, modern style that stands out without trying. Understated design for a sharp, all-black finish.

Product Dimensions ‏ : ‎ 3.54 x 13.39 x 15.35 inches; 1.9 ounces


Item model number ‏ : ‎ F-91W-1X


Department ‏ : ‎ mens


Batteries ‏ : ‎ 1 Lithium Metal batteries required. (included)


Date First Available ‏ : ‎ October 2, 2001


Manufacturer ‏ : ‎ CASIO


Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.:


Best Sellers Rank: #1,068 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1 in Men's Wrist Watches #18 in Men's Shops


#1 in Men's Wrist Watches:


Display: Digital


Watch Movement Type: Quartz


Additional Features: Alarm, Lightweight, Water Resistant


Power Source: Battery Powered


Strap Type: Adjustable


Water Resistance Depth: 100 meters


Sport Type: Running


Clasp Type: Buckle


Water Resistance Level: Water Resistant


Embellishment Feature: Crystal


Closure Type: Buckle


Style Name: F-91W-1


Shape: Square


Band Color: Black


Dial Color: Gray


Theme: Sports


Pattern: Solid


Face Style: F-91W-1


Character: Fashion


Brand Name: Casio


Model Name: F-91W-1X


Included Components: All


Model Number: F-91W-1X


Series Number: 91


Number of Packs: 1


Item Weight: 1.9 ounces


Global Trade Identification Number: 80, 48, 97, 42


Unit Count: 1 Count


Model Series: Classic


Manufacturer: CASIO


Manufacturer Warranty Description: year


Number of Items: 1


UPC: 801134771480 079767246280


Age Range Description: Adult


Item Type Name: Casual Watch


Manufacturer Part Number: F91W-1


Band Material Type: Resin


Case Material Type: Resin


Crystal: Glass


Case Diameter: 33 millimeters


Band Width: 18.5 millimeters


Case Thickness: 8 millimeters


Band Length: 22 centimeters


Bands: 1


Warranty Type: Manufacturer


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 20 – Oct 21

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View our full returns policy here.

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Top Amazon Reviews

    • Great everyday watch
Color: Black Style: F-91W-1
Review Image by Alex
I’ve been wearing this watch every day for about five months now, including to work, and it has held up great. I really like the sleek, simple look. It’s versatile enough that it looks good with a casual outfit but also works well with a uniform. One feature I use all the time is the timer for my lunch breaks. It makes it easy to keep track of my time and make sure I stay on schedule. After five months of daily wear, it’s still working great and has been very reliable. Definitely a great everyday watch, especially for the price. ... show more
Reviewed in the United States on September 2, 2026 by Alex
    • Works Perfectly!
Color: Black Style: F-91W-1
Extremely functional and convenient watch. I purchased it because I wanted to tell the time in class without having to pull out my phone, this watch has been perfect. It has not scratched and only lost 2 seconds of time in the month that I've had it. The material is durable and not uncomfortable. It is impressively lightweight and thin. Only flaws are that the alarm function is pretty limited and the light stinks. Other than that, highly recommendable for any time telling needs! ... show more
Reviewed in the United States on September 28, 2026 by Andrew Tai
    • Amazing Watch for the Price + [Makeshift] Button Repair Help
Color: Black Style: F-91W-1
There's nothing bad I can say about the watch. Seriously. I'm a 16 year old kid (you know how reckless we can get) who has had this for I think over a year now, and I can honestly say this thing is REALLY DURABLE!! *How durable* you ask? I wear this thing to school nearly everyday, never having to worry about it. Yes, that means I travel with this thing very often. At school I sometimes even abuse my watch in front of my friends by slapping it on the table with full force to show them that they DO NOT wanna get slapped by this thing (it's just a joke; I would never hurt anyone unless there is very good reason since I'm pretty passive, but they're now aware I have a makeshift weapon with me at all times). I went to Cambodia last summer for a whole month, taking it across the ocean with me, swam in saltwater with it, and traveled most of the country. Surprisingly the airport security all 8 times said nothing about my watch, as it is related to being the official Al-Qaeda watch... something which is a fun fact to tell people. This thing is *still* going strong. It's clear as day to read, with very minor scratches on the face of it. The scratches are not even noticeable at 2 feet away from my eyes (even after the abuse)! The light it has is very long lasting as well, and is bright enough that you can use it as a very makeshift flashlight for things that are very close to you by facing the light away from you and pressing the button for it. It has helped me find light switches in the dark many of times. For settings things, it's very very easy. You may only need to look at the manual probably 2-5 times before you remember everything necessary because it's just so simple. If any buttons are broken it's a pretty simple fix as well; here's what I did: 1a.) Unscrew the thing on the back if you have the right kind of screws. If not, look for them on Amazon. They are I think a -2 Phillips. 1b.) Take out the screws very carefully and put them somewhere they won't be lost. They are very small, hard to handle, and easy to lose. 2.) Gently take out the rubber thing that covers the internal edges. Feel around if you don't see it right away, you will eventually. 3.) Grab a pair of small scissors, meaning the tips of the blade can fit into a small space. 4.) In the watch there are Signal Connectors, which look like small arms coming from the middle edges of the actual machine. 5.) Simply bend them perhaps 45 degrees toward the actual machine using the scissors as pliers. Make sure the button does not lay under or over the Signal Connector, only to the side of it where it can be pressed. 6a.) Repeatedly press the button time to time to test if the function of the button is restored. 6b.) Adjust the angle in step 5 as necessary. You want to bend the Connector to the point it doesn't always touch the Receiver (the thing that actually performs the function of each button), or you will have a frozen watch. 7.) When the button finally works again after some toying around, put the rubber thing back in, pressing every corner back into place, and then screw the case back into place very tightly. 8.) Drop the watch in water before you wear it to ensure you won't get electrocuted. The alarm has gotten me up most of the times, and I'm not a light sleeper. Although I'm also nowhere near a heavy one. The inaccuracy can seriously vary... once it was off by a minute in a week. This week it is only off by about 7 seconds. Really, just sync it weekly and you should be fine. The watch is very good if you just need a very good idea of what the time is. Thanks for reading! I would definitely recommend this watch and perhaps will buy it again if the dang thing finally breaks!! ... show more
Reviewed in the United States on April 4, 2014 by Henryen
    • Too many reviews
Color: Black Style: F-91W-1
There are simply too many reviews of this watch. So instead of a review I’d like to share with you a conversation I had the other day with one of my co-workers. Co-work: What’s that on your wrist? Did you borrow that watch from you 10 year old son? It’s so small and cheap looking. I didn’t think you ever knew how to read a LCD display. Casio F-91W Owner: It’s a Casio F-91W, and no I didn’t borrow it from my son, but sometimes I let him borrow it from me. I know that I typically, prefer analogue watches with a mechanical or automatic movements. I did need to read the instruction manual I figure out how to read the digital display. Once I figured out that the colon on the display is separating the hours (on the left) from the minute (on the right) and the smaller numbers on the far right represent the seconds; it’s actual easier to read that the 3 hand analogues. Co-work: So, why did you buy this watch? It doesn’t seem to fit in with your Seiko 5, Orient, HMT, Citizen Eco-drive or that Chinese knock-off of an expensive German watch you can’t afford, that you typically wear to the office. Casio F-91W Owner: It’s nothing like my other watches, but this watch is one of the great classics. This model was first made in 1991, and was the smart watch of its time. The features and price-point is also unbeatable. I got it specifically because I am going on vacation to the beach and I wanted an affordable watch to wear of the beach and in the pool. This is proven technology; this model has been manufacture for over two decades and it’s almost bombproof. Co-work: Doesn’t WR mean Water Resistant; like splash and rain resistant only. I thought you need at least a 50m or 100m rating to take it swimming. Casio F-91W Owner: You are completely correct, and completely wrong. A watch worth worrying about needs at least a 50m or preferable a 100m rating just for swimming on the surface more or less. Personally, I wouldn’t take any of my other watches swimming on purpose, even though some of them have a 100m rating. However, this Casio is very modest in cost and I consider the manufactures water resistance rating is very under stated. Sure, if I ruin this watch swimming, the manufacture going to tell me to fly a kite, if I made a warranty claim, but this is a ten dollar watch. If you have ten dollars to wager, like I do, throw caution to the wind or perhaps dive in head first with it. It’s a lot like jaywalking, it’s not recommended, but you not trueing living your life to the fullest if you follow every rule. I sure a G-Shock with 200m water rating is manufacture with more seals and offers better water protection, but I also think that the water resistance rating is partially just marketing to separate Casio’s $10 watches from their $100 watches. I’ve taken this watch in the ocean and dove in swimming pools with no problems. I’d recommend not pressing the buttons when it’s wet, as well as not being a cry baby if you ruin it, but this watch is suitable for swimming in my book. Co-work: Wow, what a risk taker, they must be paying you too much, if you have ten bucks to risk like that. So you say it’s was the smart watch of its time back in the day. What’s so smart about this watch? Casio F-91W Owner: Well for starters, a day-date complication with annual calendar, that only needs to be corrected for leap years. It switches between AM/PM and 24 hour format with a single push of a button. It has a hourly repeater that can be turned on and off. A stopwatch function, and am alarm. Did I mention it has a very dim light, and I believe it was y2k compliant nearly a decade in advance. Co-work: Wow, I think my iwatch can do all that, but I don’t know how to. I also paid a lot more than you, and I can’t take it swimming. How about battery life? Where’s the charger plug? Is it self-winding, like you Seiko 5, and going to die after a few days off your wrist? I know for sure that in 1991 there was no such thing as wireless charging. Casio F-91W Owner: It’s much for low tech then wireless charging, or self-winding. It’s powered by a replaceable battery. Casio claims 7-years on a single battery with no daily recharging required. It’s more likely that the strap will break, before the battery will need to be replaced. It doesn’t need any sunlight either, some people claim to get 10 years on a single battery, it really depends on how frequent the light and alarm functions are utilized. In theory you could hide out in a cave for years without worrying about charging or replacing the battery. Co-work: Hey, one more question. I know you are married, but ascetically speaking, do you think I watch like this would be helpful in attraction women? It’s kind of ugly looking. Casio F-91W Owner: Well my friend, with you ugly face and abrasive personality, if a woman takes the time to look at your watch, she’ll be excited to see a practical watch on your wrist. Well unless she’s a gold digger type, but you don’t need that. Any women that can’t appreciate a classic watch like this doesn’t even desire to go dutch at McDonalds with you. However, for you, I’d strongly recommend the Casio CA53W, if you want a line of highly desirable ladies wanting to go out with you. If you wear a Casio CA53W and a lady starts a conversation about your watch, you’ll need to take her somewhere nice, like a sit-down type restaurant, and pay the whole bill, and she’ll surely want a second date when she see you generously calculate 18% gratuity with your calculator watch. ... show more
Reviewed in the United States on October 10, 2016 by Matt
    • Decent watch
Color: Black Style: F-91W-1
Review Image by Andres Moreno
This watch is very reliable, doesn’t break easily and the color is perfect
Reviewed in the United States on September 18, 2026 by Andres Moreno
    • Great Buy
Color: Black Style: F-91W-1
Review Image by Wesley Whiting
You really can’t beat this watch for the price. It’s incredibly lightweight, comfortable enough to forget you’re even wearing it, and the battery lasts for years. It keeps accurate time, has an alarm, stopwatch, and backlight, and the classic retro design never goes out of style. Whether you’re wearing it every day, working, or just want a reliable no-frills watch, this is one of the best values you can buy. Highly recommended. ... show more
Reviewed in the United States on July 29, 2026 by Wesley Whiting
    • Classic Watch That Makes a Great Gift
Color: Black Style: F-91W-1
Pros Classic, timeless design that never goes out of style. Lightweight and comfortable for everyday wear. Easy-to-read display with useful features like a stopwatch, alarm, and LED light. Reliable and accurate timekeeping. Excellent value for the price. Makes a thoughtful gift for a wide range of ages and styles. Cons The LED light is fairly basic. The resin band may not feel as premium as other materials. Overall I purchased this as a gift, and it was a hit. It's simple, practical, and has that iconic design that never seems to go out of style. For the price, it's hard to beat the reliability and functionality you get. A great gift and an easy recommendation. It's great for everyday use, combines with anything, it was an amazing gift my bf loved it and he looks great with it. Also the strap is really cool ... show more
Reviewed in the United States on June 7, 2026 by Sydney G.
    • The is an excellent wristwatch. It is remarkably affordable.
Color: Black Style: F-91W-1
I enjoy this watch every day, It is comfortable, durable and easy to wear. It shows time, day, date and other useful information, The Casio watch is remarkably accurate. it is weather-proof and the battery lasts a long time.
Reviewed in the United States on August 7, 2026 by Arthur Hubbard

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