• Casio Quartz Watch with Resin Strap, Blue, 20 (Model: F-91WS-2CF)
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Casio Quartz Watch with Resin Strap, Blue, 20 (Model: F-91WS-2CF)

4.6 out of 5 stars 1,048 ratings
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About this item

  • Water Resistant, LED light
  • Stopwatch, Daily alarm, Hourly time signal
  • Calendar, 12/24-hour format
  • Approx. battery life: 7 years on CR2016
  • Case diameter: 30.0 millimeters

Additional information

Country of origin
Thailand
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Looks and functions as if it were new. Minor packaging damage observed during inspection.
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Casio Quartz Watch with Resin Strap, Blue, 20 (Model: F-91WS-2CF)
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Product description

A tried and true style great for casual wear. With its daily alarm, hourly time signal and auto calendar, youâ ll never need to worry about missing an appointment again. Casual Classic watch with a Blue Skeleton Resin Band

Product specifications

Watch Information
Brand, Seller, or Collection Name Casio
Model Number F-91WS-2CF
Part Number F-91WS-2CF
Model Year 2020
Item Shape Square
Dial window material type Sapphire Crystal
Display Type Digital
Clasp Type Tang Buckle
Case material Resin
Case diameter 30 millimeters
Case Thickness 8 millimeters
Band Material Resin
Band size Unisex
Band width 20 millimeters
Band Colour Blue
Dial colour Gray
Bezel material Resin
Bezel function Stationary
Calendar Day-Date
Special features Shock Resistant
Item weight 77 grams
Movement Quartz
Water resistant depth 30 meters
Warranty type Contact seller of record
Warranty If this product is sold by 鶹, please review the manufacturer’s website for warranty information. If this product is sold by another party, please contact the seller directly for warranty information for this product. You may also be able to find warranty information on the manufacturer’s website.

Product details

  • Batteries ‏ : ‎ 1 Product Specific batteries required. (included)
  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 15.24 x 15.24 x 10.16 cm; 77.11 g
  • Date First Available ‏ : ‎ April 4 2020
  • Manufacturer ‏ : ‎ Casio
  • Place of Business ‏ : ‎ HOUSTON, TX, 77041 US
  • ASIN ‏ : ‎ B086RQT2KC
  • Item model number ‏ : ‎ F-91WS-2CF
  • Country of origin ‏ : ‎ Thailand
  • Department ‏ : ‎ unisex-adult
  • 鶹 Rank: #8,453 in Clothing, Shoes & Accessories (See Top 100 in Clothing, Shoes & Accessories)
  • Customer Reviews:
    4.6 out of 5 stars 1,048 ratings

From the manufacturer

Casio Values

"Necessity is not the mother of invention, invention is the mother of necessity." These are the words of one of Casio's founders. The people who created Casio were determined to 'invent necessity'- to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio's way of building an even more prosperous, richly rewarding world.

Key Features

50 Meters Water Resistant

30 Meter (100 Feet) Water Resistant

Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming.

Alarm

Daily Alarm

Stopwatch

1/100 Second Stopwatch

Casio Logo

Casio Accuracy and Reliability

Top Brand: Casio

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100K+ customers rate items from this brand highly
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Customer reviews

4.6 out of 5 stars
1,048 global ratings

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Customers say

Customers like the appearance, size, and color of the watch. They mention it looks stylish, fits the retro vibe, and is of good quality. Customers also appreciate the ease of use, functionality, and lightweight design. However, some customers have reported that the built-in light is useless and only partially lights up a segment of the screen.

Select to learn more

AppearanceSizeColorQualityEase of useFunctionalityLightweightBacklight
9 customers mention "Appearance"9 positive0 negative

Customers like the appearance of the watch. They mention it looks stylish and fits the retro vibe they wanted.

"...She's very thrilled that it looks way more cuter than the actual picture. If it lasts for years as did her Timex, that too will be a greater bonus." Read more

"...Easy to set up using youtube videos. Looks stylish too and I love the light blue colour." Read more

"...They look really nice better than I thought they would be. I had a 1980s version in black when I was a kid and I know my kids will like these." Read more

"In love with the color and watch." Read more

7 customers mention "Size"5 positive2 negative

Customers like the size of the watch. They mention it fits the bill and has a fun color.

"...This watch fit the bill. The fun color is a bonus. She's very thrilled that it looks way more cuter than the actual picture...." Read more

"The overall size of the watch is good however the display size is way too small...." Read more

"I should have returned the watch, very disappointed in the size of the numbers and the light is useless." Read more

"Water resistant, easy to read! Perfect size for kids!" Read more

4 customers mention "Color"4 positive0 negative

Customers like the light blue color of the watch. They mention it fits the bill and the fun color is a bonus.

"...This watch fit the bill. The fun color is a bonus. She's very thrilled that it looks way more cuter than the actual picture...." Read more

"...Looks stylish too and I love the light blue colour." Read more

"The F-91W is a classic and the color options are a great addition to this icon...." Read more

"Best blue (tooth) watch ever...." Read more

4 customers mention "Quality"4 positive0 negative

Customers are satisfied with the quality of the watch. They mention it's excellent and of good quality.

"Awesome watch. It's so great for the price. I don't use all the features like the timer and whatnot but I like how it has the date and everything...." Read more

"Best watch ever...." Read more

"Good quality..." Read more

3 customers mention "Ease of use"3 positive0 negative

Customers like the ease of use of the watch. They mention it's easy to set up using YouTube videos and the strap goes back well.

"...Easy to set up using youtube videos. Looks stylish too and I love the light blue colour." Read more

"Great watch for an adult or child, it is easy to use and the strap goes back well with anything you like that is blue." Read more

3 customers mention "Functionality"3 positive0 negative

Customers like the functionality of the watch. They mention it's cute and very good.

"Very good, I really like it. A good package." Read more

"Great value. Works very well.Would buy again." Read more

"Cute and functional..." Read more

3 customers mention "Lightweight"3 positive0 negative

Customers like the lightweight design of the watch. They mention it's slim and lightweight.

"Really liked the watch, slim, lightweight but the night light shone weakly through top left corner only and I couldn't read the time at all....I..." Read more

"Light function is weak but that's to be expected, otherwise very lightweight on the wrist and received many compliments" Read more

"...Its super low profile, slim, super durable. Just what Im looking for in a watch." Read more

7 customers mention "Backlight"0 positive7 negative

Customers are dissatisfied with the backlight of the watch. They mention it's useless and doesn't illuminate the display at all.

"Light function is weak but that's to be expected, otherwise very lightweight on the wrist and received many compliments" Read more

"Really liked the watch, slim, lightweight but the night light shone weakly through top left corner only and I couldn't read the time at all....I..." Read more

"...The backlight however is absolute trash, but at this price what can you expect?" Read more

"...Also the built in light is useless and doesn’t illuminate the display at all!" Read more

Good quality
5 out of 5 stars
Good quality
Very good, I really like it. A good package.
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Top reviews from Canada

  • Gen
    5.0 out of 5 stars Cute and functional
    Reviewed in Canada on July 9, 2024
    Verified Purchase
    After giving its final last tick, my daughter was finally ready to move on from her digital Timex Expedition. Having decided to go with Casio, we narrowed down the choices to digital (as she needed the timer, alarm and calendar) and has to look retro. This watch fit the bill. The fun color is a bonus. She's very thrilled that it looks way more cuter than the actual picture. If it lasts for years as did her Timex, that too will be a greater bonus.
    3 people found this helpful
    Helpful
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  • E
    5.0 out of 5 stars Affordable and stylish
    Reviewed in Canada on August 3, 2024
    Verified Purchase
    Light function is weak but that's to be expected, otherwise very lightweight on the wrist and received many compliments
    2 people found this helpful
    Helpful
     Report
  • AL
    5.0 out of 5 stars Great watch, great price
    Reviewed in Canada on February 3, 2025
    Verified Purchase
    Awesome watch. It's so great for the price. I don't use all the features like the timer and whatnot but I like how it has the date and everything. Easy to set up using youtube videos. Looks stylish too and I love the light blue colour.
    One person found this helpful
    Helpful
     Report
  • Generalbachan
    4.0 out of 5 stars Poor night light
    Reviewed in Canada on December 26, 2024
    Verified Purchase
    Really liked the watch, slim, lightweight but the night light shone weakly through top left corner only and I couldn't read the time at all....I will be returning it and getting a similar Casio with a better night light since I really need it for night time use.
    One person found this helpful
    Helpful
     Report
  • Maryse
    5.0 out of 5 stars Excellente montre!
    Reviewed in Canada on June 7, 2023
    Verified Purchase
    J’ai acheté cette montre pour surfer même si elle supposer être “seulement” water resistant. Honnêtement, j’ai surfer déjà plusieurs fois avec et ma montre marche toujours. Elle est beaucoup plus que juste résistante à l’eau. Par contre, n’utilisez pas les boutons donc l’eau. La couleur est magnifique et elle est petite. Juste la lumière pour le soir qui est pas la meilleure, mais sinon le produit général est parfait pour mes besoins.
    Helpful
     Report
  • Melissa
    5.0 out of 5 stars Watch Review
    Reviewed in Canada on July 26, 2025
    Verified Purchase
    Great watch for an adult or child, it is easy to use and the strap goes back well with anything you like that is blue.
    Helpful
     Report
  • jw
    5.0 out of 5 stars For a gift
    Reviewed in Canada on December 11, 2023
    Verified Purchase
    Bought this colour translucent blue as well as pink for my kids for Christmas. They look really nice better than I thought they would be. I had a 1980s version in black when I was a kid and I know my kids will like these.
    2 people found this helpful
    Helpful
     Report
  • Blanco
    5.0 out of 5 stars Best blue (tooth) watch ever.
    Reviewed in Canada on July 27, 2024
    Verified Purchase
    If you have big wrists dont bother. Otherwise this has to be the best watch out there. Its super low profile, slim, super durable. Just what Im looking for in a watch.
    Helpful
     Report

Top reviews from other countries

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  • Julia Pijagin
    5.0 out of 5 stars Casio Uhr
    Reviewed in Germany on October 23, 2024
    Verified Purchase
    super schöne Uhr, schnelle Lieferung
    Report
  • Sackett Outbound
    5.0 out of 5 stars Affordable, stylish, reliable
    Reviewed in the United States on July 26, 2025
    Verified Purchase
    The Casio F91W is a classic digital watch that’s perfect for everyday use. It’s lightweight, durable, and super reliable. The display is easy to read and shows the hour, minute, second, day, and date. It also has helpful features like a daily alarm, LED light, and a 1/100 second stopwatch—great for timing quick tasks.

    One of the best parts? The 7-year battery life means you rarely have to worry about it dying. Plus, it’s water-resistant, which adds to its practicality for daily wear.

    If you’re looking for a simple, affordable, and trustworthy digital watch, the Casio F91W is hard to beat.
    Customer image
    Sackett Outbound
    5.0 out of 5 stars
    Affordable, stylish, reliable

    Reviewed in the United States on July 26, 2025
    The Casio F91W is a classic digital watch that’s perfect for everyday use. It’s lightweight, durable, and super reliable. The display is easy to read and shows the hour, minute, second, day, and date. It also has helpful features like a daily alarm, LED light, and a 1/100 second stopwatch—great for timing quick tasks.

    One of the best parts? The 7-year battery life means you rarely have to worry about it dying. Plus, it’s water-resistant, which adds to its practicality for daily wear.

    If you’re looking for a simple, affordable, and trustworthy digital watch, the Casio F91W is hard to beat.
    Images in this review
    Customer imageCustomer image
    Report
  • Beate
    5.0 out of 5 stars Tolle Uhr
    Reviewed in Germany on July 22, 2024
    Verified Purchase
    Mein Mann hat seit vielen Jahren so eine Uhr. Ich brauchte für die Arbeit eine, hab sie mir bestellt und bin zufrieden.
    Customer image
    Beate
    5.0 out of 5 stars
    Tolle Uhr

    Reviewed in Germany on July 22, 2024
    Mein Mann hat seit vielen Jahren so eine Uhr. Ich brauchte für die Arbeit eine, hab sie mir bestellt und bin zufrieden.
    Images in this review
    Customer image
    Report
  • Pierre Küchmann
    5.0 out of 5 stars gute uhr
    Reviewed in Germany on November 1, 2023
    Verified Purchase
    Sogar mit alarm funktion
    Report
  • carlos
    5.0 out of 5 stars Bonito.
    Reviewed in Mexico on July 22, 2025
    Verified Purchase
    Está genial y viene como está en la descripción.
    Report