Choosing between the Casio A168W vs Casio F91W comes down to two main factors: budget and backlight quality. The F91W is the ultimate budget champion at roughly $20, offering legendary durability in an ultra-light 21g plastic body, though its backlight is notoriously weak. The A168W costs about $60–$80, featuring a premium stainless steel build (50g) and a superior electro-luminescent backlight that illuminates the entire screen. While both share identical core functions like a 7-year battery life and 30m water resistance, the A168W is the choice for style and night visibility, whereas the F91W remains the king of “set it and forget it” utility.
The Legends: A Brief History
The Casio F91W and Casio A168W are icons of the digital watch world, representing the peak of affordable reliability. Released in 1989, the Casio F-91W became the best-selling watch in history with over 100 million units sold, famous for its use by soldiers, athletes, and in countless movies. The Casio A168W followed with a similar internal heartbeat but wrapped in a retro-futuristic metal case that appeals to fashion-conscious wearers. Both watches prove that you do not need to spend a fortune to get a timepiece that lasts for decades.
Price Comparison: Budget vs. Premium
The most immediate difference between these two watches is the price tag, which reflects their build materials and market positioning.
| Feature | Casio F91W | Casio A168W (Standard) | Casio A168W (Gold/Special) |
|---|---|---|---|
| US Price | ~$19.61 | ~$59.95 | ~$79.95+ |
| India Price | ₹1,500 – ₹2,500 | ₹2,695 | ₹5,295+ |
| UK Price | £7 – £10 | £60 | £170 (Special Editions) |
| Philippines Price | ₱1,220 | ₱2,820 | N/A |
| Value Proposition | Unbeatable budget tool | Premium retro style | Collector’s item |
The F91W is often found for under $20, making it one of the cheapest reliable watches on Earth. In contrast, the A168W commands a premium, typically costing 3 to 4 times more than its plastic cousin. Special editions of the A168W, such as the recent Nikon-inspired models, can reach prices as high as £170, far exceeding the original’s value proposition.
Design & Build: Plastic vs. Metal
The physical construction is where the Casio A168W vs F91W debate becomes most tangible, separating the utilitarian from the stylish.
The F91W is built from resin (plastic) for both the case and the strap. It is incredibly lightweight at just 21 grams, making it almost unnoticeable on the wrist. Its design is purely functional, with a simple black plastic look that has remained unchanged since 1989.
The A168W features a stainless steel bracelet and a case with chrome plating over resin. Weighing in at 50 grams, it feels substantial and “real” compared to the toy-like feel of the F91W. The angular, retro design of the A168W makes it a fashion statement suitable for office wear, while the F91W remains a sports or casual tool.
The Backlight Battle: Micro-Light vs. EL
If you plan to check the time in the dark, this single feature should decide your purchase.
The F91W uses a “micro-light” LED located on the left side of the display. When activated, it emits a weak green glow that barely illuminates the first two digits of the time, leaving the rest of the screen in shadow. Users often describe it as “laughable” or “barely there,” requiring you to angle the watch perfectly to read it.
The A168W utilizes an electro-luminescent (EL) backlight. This technology lights up the entire display evenly with a soft, bright green glow. It is vastly superior for nighttime visibility, allowing you to read the time instantly from any angle without squinting. For anyone who values legibility in low light, the A168W is the clear winner.
Features & Specifications
Despite their different exteriors, the internal engines of these watches are remarkably similar, offering the same core utility.
| Specification | Casio F91W | Casio A168W |
|---|---|---|
| Module | 593 | 3298 |
| Battery | CR2016 | CR2016 |
| Battery Life | ~7 Years | ~7 Years |
| Stopwatch | 1/100-second | 1/100-second |
| Alarm | Daily Alarm | Daily Alarm |
| Time Signal | Hourly Chime | Hourly Chime |
| Calendar | Auto-Calendar | Auto-Calendar |
| Accuracy | ±30 seconds/month | ±30 seconds/month |
| Glass | Acrylic/Resin | Mineral/Resin Glass |
Both watches run on a CR2016 battery that typically lasts 7 years. They share identical functions including a 1/100-second stopwatch, a daily alarm, and an auto-calendar that adjusts for short months. The accuracy for both is rated at ±30 seconds per month, which is standard for quartz movements in this class. The main technical difference lies in the module number (593 vs. 3298), which dictates the backlight behavior and display driving.
Water Resistance Reality
Both watches carry a 30-meter (3 ATM) water resistance rating, but real-world usage suggests they are tougher than the label implies.
Officially, “30 meters” means splash-proof only. You should wear them in the rain or while washing hands, but not for swimming or diving. The F91W has a rubber seal on the back case but lacks seals on the buttons, meaning pressing them underwater could let water in.
However, enthusiasts frequently report taking the F91W swimming and even scuba diving to depths of 24.5 meters without failure. The A168W shares this reputation, with users safely swimming in it despite the “water resistant” label. While neither is officially a dive watch, both are surprisingly resilient in wet conditions as long as you avoid pressing buttons while submerged.
Comfort & Wearability
Comfort is subjective, but the weight difference between these two models creates distinct wearing experiences.
The F91W is the king of comfort for active lifestyles. At 21 grams, it is so light that you will forget you are wearing it. The soft resin strap flexes easily, making it ideal for sleeping, sports, and hot weather where sweat is a factor.
The A168W is significantly heavier at 50 grams. The stainless steel band can feel stiff initially and may pull on arm hair. While it looks more professional, some users find it less comfortable for 24/7 wear compared to the F91W. Many A168W owners eventually swap the metal bracelet for a NATO strap to improve comfort while keeping the metal case look.
Hidden Secrets & Anti-Counterfeit
Both watches include a clever, hidden feature designed to help you spot fakes, which are common due to their popularity.
To test authenticity, press and hold the right-hand button (usually the “Start/Stop” or “Set” button). On a genuine watch, the display will flash the word “CASIo” with a lowercase “o”. If the screen shows “CASIO” in all capital letters or nothing at all, the watch is likely a counterfeit. This secret code works on both the F91W and A168W models, serving as a quick verification method for buyers.
Modding Potential
The watch modding community loves both models, but they serve different purposes in the hobby.
The A168W is the preferred base for case mods. Because of its metal-compatible dimensions, you can buy full kits to upgrade the bezel, change the plating color, or install weighted metal bracelets. High-end custom mods on sites like Etsy can cost over $145, transforming the watch into a unique luxury-looking piece.
The F91W is the canvas for functional and strap mods. Popular upgrades include swapping the plastic strap for a colorful NATO band, installing a negative LCD filter for better contrast, or even adding custom LED backlight upgrades to fix the dim original light. Advanced tech mods like the Ollee PCB can even add step counting and NFC capabilities to the cheap F91W.
Which better according to my point of View
The choice between the Casio A168W vs F91W depends entirely on what you value more: price and weight, or style and visibility.
Choose the Casio F91W if:
- You want the best value (under $20).
- You need an ultra-light watch for sports or sleep.
- You rarely check the time in the dark.
- You want a legendary, no-nonsense tool watch.
Choose the Casio A168W if:
- You want a bright, full-screen backlight.
- You prefer the look and feel of stainless steel.
- You want a watch that doubles as a fashion accessory.
- You are interested in modding the case or bracelet.
Both watches are exceptional values that offer 7-year battery life and rugged durability. You truly cannot go wrong with either, but the A168W justifies its higher price with better materials and a much better light, while the F91W remains the unbeatable champion of budget reliability.
Limitations & Unknowns
- Backlight Nuances: While the general performance difference (weak LED vs. strong EL) is well-documented, detailed photometric analysis of the backlight brightness in various specific lighting conditions (e.g., total darkness vs. twilight) was not available in the source data.
- Long-term Plating: Specific data on how long the chrome plating on the A168W lasts before wearing off in daily heavy use varies by user report and was not quantified in official specs.
