Casio F-91W vs Invicta Pro Diver Men's Watch
Buy the Casio F-91W if you want the cheapest, lightest watch that just works. Buy the Invicta Pro Diver if you want a steel dive-style watch with 200 m water resistance and a mineral crystal. The Casio is $18.95 at Amazon as of November 3, 2026; no current price was given for the Invicta, so check its live price before deciding.
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Casio F-91W
4.1$18.95at AmazonObserved at 9:03 PM
Choose the Casio F-91W if you want a sub-$20, near-weightless digital with a 7-year battery, alarm and stopwatch.
Pros
- Costs under $20
- Very light and slim on the wrist
- 7-year battery life
- Alarm, stopwatch and LED backlight
- Long record of everyday durability
Cons
- Resin glass scratches easily
- Rated water resistant only, with no depth figure
- Can drift a couple of minutes over weeks
What separates them
| Casio F-91W | Invicta Pro Diver Men's Watch | |
|---|---|---|
| Price | $18.95 at Amazon as of November 3, 2026 | No price given; check the live listing |
| Case and band material | Resin case and resin band | Steel case and stainless steel bracelet |
| Water resistance | Water resistant, no depth rating given | 200 m |
| Crystal | Resin glass | Mineral crystal |
| Weight and profile | Very slim and near-weightless | Steel watch, noticeably heavier |
| Battery | About 7 years on CR2016 | Quartz PC32A; battery life not stated |
| Accuracy | ±30 seconds per month | Not stated |
| Bezel |
Price history
$52.20$18.95
- Casio F-91W: lowest $18.95 on Oct 30 at Amazon; $18.95 on Nov 3.
- Invicta Pro Diver Men's Watch: lowest $52.20 on Nov 1.
Prices at every store
Casio F-91W
- eBayNew
In stockSold by qualitywatchbands
$34.94+ $4.95 shippingObserved at 9:03 PM - AmazonNew
Availability unknown
$18.95Observed at 9:03 PM
Also available at
- Best BuyCheck price at Best Buy
- WalmartCheck price at Walmart
Invicta Pro Diver Men's Watch
- Invicta StoresCheck price at Invicta Stores
- AmazonCheck price at Amazon
- ShopSimonCheck price at ShopSimon
Specs compared
| Spec | Casio F-91W | Invicta Pro Diver Men's Watch |
|---|---|---|
| Band material | Resin Band | Stainless Steel |
| Case material | Resin | Steel |
| Battery life | Approx. battery life: 7 years on CR2016 | — |
| Water resistance | Water resistant | — |
| Glass | Resin Glass | — |
| Accuracy | ±30 seconds per month | — |
| color | Black | — |
| size | One Size | — |
| Style | Wrist | — |
| Display | Digital | — |
| Department | Unisex |
Questions and answers
- Which is better for swimming?
- The Invicta Pro Diver. It is rated to 200 m and has a screw-down-style dive build. The Casio is only listed as water resistant with no depth rating.
- Which lasts longer?
- The Casio has a stated 7-year battery and a long reputation for surviving daily wear. The Invicta uses steel and mineral crystal, which resist scratches and knocks better, but its battery life is not stated.
- Is the Invicta worth the extra money?
- If you want steel, a dive bezel and 200 m water resistance, yes. If you just need the time, alarm and stopwatch, the $18.95 Casio covers that for far less.
- Which is more accurate?
- The Casio is rated at ±30 seconds per month, though owners report drift of a couple of minutes over weeks. No accuracy figure is given for the Invicta.
- Which is better for a small wrist?
- The Casio. Its 33 mm resin case is slim and light. The Invicta's 38 mm steel case and bracelet sit heavier and bulkier.
- Does the Casio have a light?
- Yes, it has an LED microlight for reading in the dark. The Invicta's listing does not mention lume or a light.
