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Casio F-105W-1A Vintage Illuminator | Classic Digital Watch | EL Backlight | 1/100-Second Stopwatch | Daily Alarm | 7-Year Battery | Water Resistant | Unisex

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Availability: Only 1 left in stock, order soon!
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Arrives Jul 21 – Jul 24
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Description

The Casio F-105W-1A occupies a unique and beloved position in the Casio digital lineup — it's the F-91W with the one upgrade that enthusiasts have always wanted. Where the F-91W uses a standard LED micro-light that illuminates only a portion of the display, the F-105W-1A steps up to a full Electro Luminescent backlight — the same even-glow technology found in more premium Casio models — that lights the entire dial surface in one soft, evenly distributed glow. It's a small difference on paper and a significant one in practice, especially in low-light environments where the F-91W's partial illumination leaves something to be desired. In watch collector circles, the F-105W-1A has developed a genuine following as the definitive version of the classic Casio rectangular digital — often called the ""F91W EL"" — and it's easy to understand why. Everything else about the F-105W-1A is unchanged from the proven F-91W formula. The resin case measures 39 × 35.4 × 9.6mm and the total weight is just 21 grams — a barely-there presence on the wrist that makes it one of the most comfortable daily wearers available at any price. The classic black case with blue accent ring and matching black resin band deliver the timeless aesthetic that has made the F-series a design icon. The rectangular LCD dial displays time, day, and date, and includes a daily alarm, 1/100-second stopwatch, and hourly time signal — everything you need, nothing you don't, in a layout that has proven itself across decades of daily use. CASIO This is one of Casio's best no-frills watches — a lightweight resin case, EL backlight, daily alarm, stopwatch, and an auto-calendar that handles the date so you don't have to. A CR2016 battery powers it for approximately 7 years, and the watch is water resistant for everyday use including splashes and rain. Whether you're a long-time F-series fan upgrading from the F-91W, a first-time Casio buyer, or a collector looking to add the EL variant to the lineup — the F-105W-1A is the definitive everyday Casio digital. Show off your classic style with the Casio Men's Illuminator Digital Watch F105W-1A. Protected by a durable mineral dial window, the digital-gray dial face offers at-a-glance readability while a handy day-and-date calendar keeps your schedule on track. Both the 35-millimeter case and stationary bezel are made of high-quality resin. Other details include a matching black resin band that is accompanied by a sturdy buckle closure. This affordable and striking timepiece accentuates your casual cool. It is powered by quartz movement and is water resistant to 300 feet. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); CasioWith the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, atomic timekeeping means the users never have to reset the time. Recently, Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward. See more

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 4.65 x 3.15 x 2.2 inches; 0.74 ounces


Item model number ‏ : ‎ F105W-1OS


Department ‏ : ‎ men


Batteries ‏ : ‎ 1 Lithium Metal batteries required.


Date First Available ‏ : ‎ November 12, 2003


Manufacturer ‏ : ‎ Casio


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


Best Sellers Rank: #32,763 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #66 in Men's Wrist Watches


Display: Digital


Watch Movement Type: Quartz


Power Source: Battery Powered


Strap Type: Two Piece Strap


Sport Type: Walking


Clasp Type: Buckle


Water Resistance Level: Water Resistant


Embellishment Feature: Crystal


Closure Type: Buckle


Style Name: F-105W-1A


Shape: Octagonal


Band Color: Black


Dial Color: black, blue


Theme: Sports


Pattern: Vintage


Face Style: Black" or "Blue


Brand Name: Casio


Model Name: Illuminator


Included Components: 1 x Water Resistant Strap


Model Number: F105W-1OS


Item Weight: 21 Grams


Manufacturer: Casio


UPC: 079767542085


Manufacturer Part Number: F-105W-1A


Unit Count: 1 Count


Age Range Description: Adult


Item Type Name: Watch


Band Material Type: Resin


Case Material Type: Resin


Crystal: mineral


Case Diameter: 35 Millimeters


Band Width: 18 Millimeters


Case Thickness: 10 Millimeters


Bands: 1


Warranty Type: Contact seller of record


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 21 – Jul 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Casio Quality
Ok. The Casio name has been around since 1974 and their quality speaks for itself.....It's a great buy , very comfortable , lightweight and always works. The price can't be beat.
Reviewed in the United States on April 25, 2026 by annette ploumis

  • Beautiful blue EL light! Beautiful blue EL light!
This is a really good watch but it is on a smaller side. I can just barely pull this off. I will include a picture to compare it to my regular wear. But you have to remember, the rest of the world has smaller, shorter people... this would fit a woman or boy's wrists better. It's still very wearable, but if you don't like it - just give it to someone else. It has a beautiful Electroluminicent backlight (a la Indiglo)....very classic. A man can wear it... but cannot be rough around it... maybe have it be covered up most of the time by a sleeve. Plenty of holes... but if you have thick wrists... it is not for you. Basically put a quarter and add 3mm of both sides... that is how big it is. ... show more
Reviewed in the United States on May 19, 2026 Reviewed in the United States on May 19, 2026 by Richard CSUF MSA, Wisconsin MBA

  • Electro-Luminescence Greatness - My Sleep Watch Electro-Luminescence Greatness - My Sleep Watch
This is the watch I sleep with at night because of it's outstanding Electro-Luminescence backlight. It's also so light and comfortable that you forget you are wearing it! This watch is made of resin, including for the display, so expect it to be easily scratched. Accuracy is +/- 30 seconds per month according to Casio, but mine has been much more accurate than this. Features include telling you the time (hah), setting a single alarm, hourly beep/chime, and includes a stopwatch. I'm a fan of the blue bezel, makes it look retro 80s. You can also purchase after-market mods for this watch, which I did. I bought a skxmod case and bracelet, which even elevates this watch to a higher level. Highly recommend this watch, it's a steal for the price! ... show more
Reviewed in the United States on August 11, 2025 Reviewed in the United States on August 11, 2025 by R. Blake

  • Excellent quality watch!
Excellent, classic Casio with updated and much appreciated illumination! This watch like all Casio's are very well constructed with durable materials, it has good adjustability and easy to understand instructions! These watchs are so durable and very high quality everyone should own one!
Reviewed in the United States on May 9, 2026 by Biker Bob

  • Great watch
Great watch for the price, I always find myself reaching for it because it's light, convenient, and simple.
Reviewed in the United States on April 20, 2026 by Nate

  • Good Watch at Affordable Price
I've gone through a few of these watches over the years. The strap is always what breaks first. The watch is cheap enough that it isn't worth the time or money to replace the strap, so I just get a new watch. The straps tend to last between a year and a few years. This time I decided to purchase 4 years of coverage for the watch which will hopefully cover replacement if the strap breaks. The back-light is extremely useful and illuminates the entire watch. This is much better than Casio's regular light that just shines from the upper left corner. In a pitch black setting, the back light can even be used as a very weak flashlight. The alarm and timer are easy to use. Besides for the hourly chime which you can turn on it only has the option to set one alarm. It's easy to set the time and date and the display is nice, showing time, day of the week, and day of the month. The month itself is not displayed. I've never had a problem with the waterproofing. Its fine in showers or swimming. All in all a basic watch that gets the job done at an affordable price. ... show more
Reviewed in the United States on January 10, 2020 by A

  • Great watch for under $50
I love this watch, I wear it everyday. I do a lot of outdoor activities and it has held up very well. It’s probably not the biggest fashion statement of a watch, but it does a great job.
Reviewed in the United States on May 23, 2026 by Ryan Walsh

  • Best simple digital watch ever! Takes a licking & keeps on kicking!
Love this watch. Have been wearing this model since the 1980s. Sturdy, functional, reliable, accurate & lasts for years & years. Easy to use and set up the date, time, stop watch, timer and alarm. All functions work as they should. Choice of on the hour reminder chime, 12 or 24 hour display and the alarm beeps gradually accend in volume, gently waking the wearer without disturbing those nearby who want to keep sleeping. The back light dims out after several years. The watches themselves have never cracked or broken. Rough on watches. One was replaced when lens became cloudy, covered in an accumulation over time of tiny scratches from repeated contact with rough surface . Another replacedment was bc one of the holes where the bar for the watch strap sits became enlarged & would not hold bar any longer after the strap got hung up & thankfully pop the bar out, saving my wrist. The strap has hung up before, breaking the strap instead of popping out the bar. I'm not 100%sure but I think it was a newer replacement watch band that pulled the bar out Battery & strap sre simple to replace. Oh and this watch can handle being caked with mud, paint, dust, sand, etc..., covered in shampoos, lotions, etc.., and even sprayed with cleaning liquids (bleach, white vinegar, rubbing alcohol, hydrogen peroxide, and more Never take it off, except to clean it or . It's waterproof in the pool, tub, shower, lake & ocean snorkeling & even held up on a 30 min. shallow scuba dive average depth 20ft. Ladies, if you like simple, practical, watches, but find ladies' digital watches too small and men's either too big and thick check this watch out. I don't even notice I'm wearing it. It doesn't catch on clothing or anything except for when overcome by an occasionsl knucklehead moment and move too fast before looking. Correction. When it's really cold and multiple long sleeve layers are wrapped in sleeves with elastic wrist cuffs, adjust xthe watch location for comfort.and move move way too fast farms, in the barns, corals, pastures and pens Best simple digital watch, ever. ... show more
Reviewed in the United States on February 12, 2025 by Iggy

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