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Casio F-91W vs Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch

Buy the Casio F-91W if you want a cheap, thin, light watch you can wear anywhere and forget about. Buy the Invicta 18508 Pro Diver if you want a gold-tone automatic dive watch with a Swiss movement and 200 m water resistance. The Casio is $18.95 at Amazon as of November 3, 2026; the Invicta has no price listed here, so check its current store prices before deciding.

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Casio
Casio F-91W

Casio F-91W

4.1· 351 ratings
$18.95at AmazonObserved at 9:03 PM
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Choose the Casio F-91W if you want a sub-$20 everyday digital that weighs almost nothing and runs about 7 years on one battery.

Pros
Costs $18.95 at Amazon as of November 3, 2026
  • Very thin and light, easy to wear all day
  • About 7 years of battery life on a CR2016
  • Alarm, stopwatch and backlight cover daily needs
  • Long record of durability in everyday use
    • Cons
    • Quartz accuracy of ±30 seconds per month, and owners report losing a couple of minutes over time
    • Resin glass scratches more easily than mineral or sapphire
    • Resin strap wears out and is the usual failure point
    • No depth rating for diving
    Invicta
    Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch

    Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch

    Choose the Invicta 18508 Pro Diver if you want a gold-tone steel automatic with a Swiss Sellita SW200 movement and 200 m water resistance.

    Pros
    • Swiss Sellita SW200 automatic movement
    • 200 m water resistance with a screw-down crown
    • Gold-plated stainless steel case and bracelet
    • 40mm case suits most wrists
    • Flame fusion crystal resists scratches better than resin
    Cons
    • Heavier and thicker at 14mm than a resin digital
    • Automatic movement needs servicing, which costs far more than a Casio
    • Gold plating can wear through on edges over years of use
    • No price listed here, so value is unclear until you check stores

    What separates them

    Casio F-91WInvicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch
    MovementJapanese quartz, ±30 seconds per monthSwiss Sellita SW200 automatic, self-winding
    Case size and weight33mm resin case, very slim and light40mm case, 14mm thick, steel on steel
    Water resistanceWater resistant, no depth rating given200 meters, screw-down crown
    CrystalResin glassFlame fusion
    Battery and upkeepAbout 7 years on a CR2016, no service neededNo battery, but automatic movements need periodic servicing
    Band and claspResin strap with buckleGold-plated steel bracelet with fold-over safety clasp
    FeaturesAlarm, stopwatch, LED microlight, digital displayTime and date only, analog
    Price$18.95 at Amazon as of November 3, 2026No price given in this listing

    Price history

    $54.99$18.95
    Oct 29Nov 3
    • Casio F-91W: lowest $18.95 on Oct 30 at Amazon; $18.95 on Nov 3.
    • Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch: lowest $54.99 on Nov 1 at Amazon.

    Prices at every store

    Casio F-91W

    • eBayNew

      In stockSold by qualitywatchbands

      $34.94+ $4.95 shippingObserved at 9:03 PM
      Visit store
    • AmazonNew

      Availability unknown

      As an Amazon Associate, Deal.ai earns from qualifying purchases.

      $18.95Observed at 9:03 PM
      Visit store

    Also available at

    • Best BuyCheck price at Best Buy
    • WalmartCheck price at Walmart
    All 2 stores and price history →

    Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch

    • AmazonCheck price at Amazon
    Prices and history →

    Specs compared

    SpecCasio F-91WInvicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch
    Band materialResin Bandyellow gold plated solid stainless steel
    Case materialResinyellow gold plated solid stainless steel
    Water resistanceWater resistant200 meters
    Battery lifeApprox. battery life: 7 years on CR2016—
    GlassResin Glass—
    Accuracy±30 seconds per month—
    colorBlack—
    sizeOne Size—
    StyleWrist—
    DisplayDigital—
    DepartmentUnisex—
    Water ResistantYes—
    Show all 22 specsShow fewer specs
    SpecCasio F-91WInvicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch
    With AlarmYes—
    Case width—40mm
    Case thickness—14mm
    Movement—Swiss Made Sellita SW200 automatic
    Dial color—gold tone
    Crystal—flame fusion
    Band width—20mm
    Clasp type—fold over safety lock
    Crown type—Screw Down
    Band length

    What reviewers say

    Casio F-91W

    With 351 ratings averaging 4.1 out of 5, owners treat the F-91W as a reliable, no-frills watch that does what it promises for very little money. The main recurring complaint is timekeeping drift.

    Pros
    • Great value for the price
    • All functions work as expected
    • Durable, including underwater use
    • Simple-to-use stopwatch
    Cons
    • Loses about two minutes roughly every two weeks

    Invicta Men's 18508 Pro Diver Gold Dial Yellow Gold Steel Bracelet Automatic Dive Watch

    Pro Diver automatics are generally liked as value buys: owners report the Sellita keeps good time and the watch feels heavier than its price. Common complaints are plating wear, a thick case and weak resale.

    Pros
    • Swiss automatic movement keeps good time
    • Feels solid and heavy for the money
    • Good water resistance for the price
    Cons
    • Gold plating wears on edges and clasp
    • Case is thick and top-heavy
    • Resale value is low
    Reviews
    • excellent quality. I wear this watch eve...

    Questions and answers

    Which is better for swimming?
    The Invicta, by a wide margin. It is rated to 200 m with a screw-down crown. The Casio is only marked water resistant with no depth rating, so it suits splashes and rain, not swimming.
    Which lasts longer?
    The Casio often runs 7 years on one battery and needs no service. The Invicta has no battery to change, but the automatic movement needs servicing every several years, and that service costs many times the Casio's price.
    Is the Invicta worth the extra money?
    Only if you want an automatic Swiss movement and a gold-tone steel dive watch. For telling time and everyday wear, the $18.95 Casio does the job at a fraction of the cost.
    Which is more accurate?
    The Casio is rated ±30 seconds per month, though owners report losing a couple of minutes over time. A well-regulated Sellita SW200 typically runs within about 10 to 15 seconds a day, so check the Casio against your phone now and then.
    Which is better for a small wrist?
    The Casio. Its 33mm resin case is slim and light. The Invicta is 40mm wide and 14mm thick with a steel bracelet, which feels much bigger on the wrist.
    Does the Casio have features the Invicta lacks?
    Yes. The Casio has an alarm, a stopwatch and an LED backlight. The Invicta is an analog watch with no alarm or stopwatch.

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