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Quick Picks
| Pick | Watch | Why | Link |
|---|---|---|---|
| Best for water use and set-and-forget wear | Casio MDV-106B Series | Duro Diver-Style Watch | Manufacturer-rated 200M water resistance, screw-lock crown, unidirectional bezel, ~3-year SR626SW battery | Check Price on Amazon |
| Best for a first mechanical watch | Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch | 24-jewel NH35A Japanese automatic movement, exhibition case back, 3-year limited manufacturer warranty | Check Price on Amazon |
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Last Updated: September 2026
Two entry-level dive-style watches sit at opposite ends of the same argument: battery or balance wheel. One runs a Japanese automatic movement behind an exhibition case back. The other runs a coin-cell quartz movement in a bigger, lighter case with a manufacturer-stated 200 meter water resistance rating.
This page compares them from published specifications only. Nobody on this site wore, submerged, timed or opened either watch — this website does not do hands-on testing — so everything below is read off the listing records and reasoned through.
- DIVER-INSPIRED DESIGN — Inspired by the sea, the MDV-106G is styled after classic dive watches and delivers 200-meter water resistance at an unbeatable price point. The black
- LARGE FLUORESCENT HANDS & INDICES FOR INSTANT READABILITY — The dial features hands and hour indices with large fluorescent areas for easy reading in low-light and underwater
- Stainless steel case 40mm diameter x 14.1mm thick; Exhibition case back; Black dial; Luminous hands.Band Length: 205mm
- NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight 155 grams
Quick Answer
Buy the Casio if you want a genuinely water-rated tool watch you can ignore. The manufacturer rates the Duro at 200 meters of water resistance, with a screw-lock crown, unidirectional bezel and a mineral glass crystal, and it uses an SR626SW battery with an approximate three-year life. At a stated 92 grams and 12mm tall, it is the lighter and slimmer of the two. Check Price on Amazon
Buy the Invicta if you actually want a mechanical watch. The Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch (ASIN B000JQFX1G) is listed with an NH35A Japanese Automatic movement, 24 jewel. The listing for the Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch (ASIN B000JQFX1G) states a stainless steel case 40mm in diameter and 14.1mm thick with an exhibition case back. That same Invicta listing states that a 3 year limited manufacturer warranty is included. Check Price on Amazon
Here's the thing: these two are not really competing on the same axis. One is a water-rated quartz diver-style watch. The other is a budget on-ramp into mechanical watches. Pick the axis first, then pick the watch.
Full Comparison Table
| Feature | Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch | Casio MDV-106B Series | Duro Diver-Style Watch |
|---|---|---|
| Movement | NH35A Japanese Automatic, 24 jewel | Quartz, SR626SW battery |
| Battery life | Not applicable (automatic) | Approximately 3 years (SR626SW) |
| Case diameter | 40mm | 44mm |
| Case thickness | 14.1mm | 12mm (case listed at 49.5 × 46.3 × 12.1mm) |
| Lug-to-lug | Not stated in the supplied listing | 49mm |
| Case material | Stainless steel | Stainless steel |
| Crystal | Not stated in the supplied listing | Mineral glass |
| Water resistance | Not stated in the supplied listing | 200M |
| Crown | Not stated in the supplied listing | Screw-lock |
| Bezel | Not stated in the supplied listing | Unidirectional |
| Case back | Exhibition case back | Not stated in the supplied listing |
| Dial | Black dial, luminous hands | 3-hand analog, large fluorescent hands and indices, date at 3 o'clock |
| Strap/band | Band length 205mm | 22mm lug width |
| Weight | 155 grams | 92 grams |
| Assembly | Assembled in Malaysia | Not stated in the supplied listing |
| Warranty | 3 year limited manufacturer warranty | Not stated in the supplied listing |
| Price | ||
| Buy | Check Price on Amazon | Check Price on Amazon |
One note on that table before anyone draws the wrong conclusion: a blank cell means the supplied listing does not state that figure. It does not mean the watch lacks the feature, and it does not mean the manufacturer never publishes it elsewhere.
Design & Build Quality
Both cases are stainless steel. After that, the geometry diverges sharply.
The Casio listing puts the case at 44mm in diameter, 12mm in height, with a 49mm lug-to-lug length and a 22mm lug width, and the same listing gives an overall case measurement of 49.5 × 46.3 × 12.1mm. The Invicta listing gives 40mm diameter by 14.1mm thick.
Read those together and the practical inference is straightforward: the Casio is the wider watch on the dial side, the Invicta is the taller one on the wrist. A 4mm difference in diameter is visible; a 2.1mm difference in thickness is the kind of thing that decides whether a watch slides under a shirt cuff. Neither listing states a wrist-size recommendation, so treat this as geometry, not a fit verdict.
Weight is the biggest single spec gap here. Casio lists the Duro at 92 grams; Invicta lists its watch at 155 grams. That is a 63-gram difference — roughly a 68 percent increase over the Casio — and it is exactly what you would expect from a mechanical movement plus a thicker case. Heavier is not automatically worse. Some buyers read heft as quality. But if you want something you forget you are wearing on a hike, the arithmetic favors the Casio.
The Casio's 22mm lug width is called out in the listing as making strap swaps easy with aftermarket options, which is a real ownership advantage: 22mm is a common size. The Invicta record gives a 205mm band length instead of a lug width, so a like-for-like strap comparison is not established by the supplied data.
Preferred here: split. Casio for slimness, light weight and strap flexibility; Invicta if you specifically want a smaller 40mm diameter and don't mind the extra height.
Features & Functionality
The Casio listing is the more feature-explicit of the two. It states 200 meters of water resistance, a screw-lock crown, a unidirectional bezel, mineral glass, a 3-hand analog layout with a date window at 3 o'clock, and hands and hour indices with large fluorescent areas intended for low-light and underwater readability.
That combination — screw-lock crown plus unidirectional bezel plus a 200M rating — is the recognizable dive-watch feature set. The supplied Casio MDV-106B Series | Duro Diver-Style Watch listing states only that the bezel is unidirectional; it does not state a rotation direction or any elapsed-time behaviour, so none is claimed here.
The Invicta record leads with a different kind of feature: an exhibition case back over a 24-jewel NH35A automatic, a black dial and luminous hands. An exhibition back is a display feature. It is the reason to buy a visible mechanical movement rather than a hidden one.
Critically, the supplied Invicta listing does not state a water resistance rating, a crystal material, a bezel type or a crown type. Do not read that silence as a zero. It simply means those figures are not in the record here, and a buyer who intends to swim in the Invicta should confirm its rating with the manufacturer before getting it wet.
Preferred here: the Casio, on documented water-related hardware. Not because the Invicta necessarily lacks it, but because the supplied evidence establishes it for one watch and not the other.
Performance
"Performance" in a watch like these usually means two things: does it keep running, and can you read it.
On running: the Invicta's NH35A is a Japanese automatic movement with 24 jewels, meaning it winds from wrist motion and needs no battery. The Casio runs on an SR626SW cell that the manufacturer rates at approximately three years. That is the core trade. The Casio needs a battery service roughly every three years and otherwise does nothing but tick. The Invicta needs to be worn or wound, and if it sits in a drawer it stops.
Neither listing states an accuracy specification — no seconds-per-day figure appears in either record — so anyone claiming one watch keeps better time here is guessing. As a general matter of movement type, quartz and mechanical are engineered to different accuracy classes, but the exact numbers for these two models are not established by the supplied data.
On legibility: Casio describes large fluorescent areas on both hands and indices, plus an uncluttered 3-hand layout with a date at 3. Invicta lists luminous hands and a black dial. The Casio MDV-106B Series | Duro Diver-Style Watch record specifies large fluorescent areas on the hands and the hour indices. The Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch record states luminous hands and is silent on the indices, and that silence is not evidence about them, so the supplied data does not settle night legibility between the two.
Preferred here: depends entirely on what you value. Battery-free operation goes to the Invicta. Hands-off, battery-powered running goes to the Casio. Low-light readability is not settled by the supplied listings.
Price & Value
Check current price on Amazon for both — offers on entry-level divers move constantly and any figure printed here would be stale within a week.
What the specs do let you evaluate is value density. The Invicta bundles a gift box, instructions and a three-year limited manufacturer warranty, and Invicta publishes a customer service line at 1-800-327-7682 for band adjustment, replacement links and warranty questions. For a first mechanical watch, a stated three-year warranty and a live support number are meaningful — automatics have more to go wrong than a quartz module.
The supplied Casio listing does not state a warranty term. That is an unknown, not a zero.
On the other side, the Casio's value case is that it documents the full diver feature set — 200M, screw-lock crown, unidirectional bezel, mineral glass — plus a three-year battery interval, in a 92-gram package.
Preferred here: not established. Without current pricing in front of you, both are defensible; compare the live prices and decide which feature set you are actually paying for.
Which Should You Buy?
- You want a watch for swimming, showering and general water contact. Go Casio. Its listing states 200 meters of water resistance with a screw-lock crown, which is the documented case for water use between these two.
- You want your first automatic watch. Go Invicta. The 24-jewel NH35A behind an exhibition case back is the entire point of the watch, and the three-year limited manufacturer warranty softens the risk.
- You have smaller wrists or prefer a compact dial. Lean Invicta at 40mm rather than the Casio's 44mm — but note the Invicta is the thicker of the two at 14.1mm versus 12mm.
- You want the lightest option for active wear. Casio, at a listed 92 grams versus 155 grams.
- You like changing straps. Casio, whose 22mm lug width the listing specifically calls out as compatible with a wide range of aftermarket straps.
- You want to never think about winding, wearing or servicing it. Casio, with its approximately three-year SR626SW battery.
How We Research
This site does not perform physical testing. For this comparison, the research consisted of pulling each watch's Amazon Creators API verified product record (retrieved 2026-09-09) and reading every product listing feature bullet on both listings line by line, then comparing the stated figures directly against each other — case dimensions, weight, movement, power source, water resistance and warranty.
Where one listing states a figure and the other does not, that is reported as not stated rather than converted into a negative. No accuracy figures, service intervals or durability outcomes are claimed, because neither supplied record contains them. Buyers who want independent context on product safety and recalls can consult CPSC and USA.gov consumer protection.
Related reading on this site: quartz vs automatic movements explained and how to read a dive watch water resistance rating.
Final Verdict
If you are forcing a single answer, the Casio MDV-106B Series | Duro Diver-Style Watch is the safer buy for most people, because its listing documents the things a diver-style watch is supposed to do — 200M water resistance, screw-lock crown, unidirectional bezel, fluorescent hands and indices — and it does them at a stated 92 grams with an approximately three-year battery. That is a watch you can hand to someone who has never thought about watches and it will just work.
But the Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch is not the loser here. It is a different product. A 24-jewel NH35A automatic visible through an exhibition case back, backed by a three-year limited manufacturer warranty, is a legitimately interesting thing to own, and no quartz watch scratches that itch.
Decide whether you want a tool or a mechanism. Then buy accordingly.
Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch
Frequently Asked Questions
Is the Invicta Pro Diver water resistant? The supplied listing information for this Invicta model does not state a water resistance rating. That is a gap in the record here, not proof of a low rating — confirm the figure with Invicta before swimming with it.
Which watch is bigger? The Casio is the wider one at 44mm in diameter versus the Invicta's 40mm. The Invicta is the taller one at 14.1mm thick versus the Casio's 12mm.
How often does the Casio Duro need a battery? Casio lists an SR626SW battery with an approximate three-year life. The Invicta needs no battery at all because it runs an NH35A automatic movement.
Can I change the strap on either watch? The Casio listing calls out a standard 22mm lug width and says strap upgrades are effortless with a wide range of aftermarket options. The Invicta record lists a 205mm band length but does not state a lug width, so aftermarket strap sizing is not established by the supplied data.
Which one has a warranty? The Invicta listing states a three-year limited manufacturer warranty and gives a customer service number, 1-800-327-7682, for warranty, band adjustment and replacement link questions. The supplied Casio listing does not state a warranty term.
Which is better for low-light readability? Each listing documents different details. The Casio MDV-106B Series | Duro Diver-Style Watch listing describes hands and hour indices with large fluorescent areas for reading in low-light and underwater conditions. The Invicta Men's Pro Diver Collection Coin-Edge Automatic Watch listing states a black dial with luminous hands and says nothing either way about the indices, so the supplied records do not settle which watch is more legible in low light.
Sources & Methodology
Neither of these watches was worn, submerged, timed or opened by anyone at this website — no lab, no wrist time, no stopwatch. What this comparison is built on is the Amazon Creators API verified product record for each ASIN, retrieved 2026-09-09, plus every product listing feature bullet published on both listings, read against each other spec by spec so that the case dimensions, weights, movements, power sources and stated water resistance line up in the same table.
For watches, that kind of paper comparison genuinely settles a lot: size, weight, movement type, battery interval and warranty are all published numbers, and they determine most of the buying decision. What it cannot settle is long-term accuracy drift, bezel action feel, lume duration after charging, or how either bracelet wears over a year — none of those appear in the supplied records, and you should treat any page that states them without measurement as guessing.