WATCH OF THE WEEK - THE CASIO DURO - THE MOST UNDERRATED WATCH IN THE WORLD.
A look at the Casio Duro range — MDV-106, MDV-107 and beyond
There are watches that dominate enthusiast forums, and then there are watches that quietly sell in the tens of thousands to people who simply want something that works. The Casio Duro sits firmly in the second category.
Primarily represented by the MDV-106 and the newer MDV-107, the Duro has built a reputation as one of the most affordable 200-metre dive-style watches on the market. It isn’t trying to compete with ISO-certified professional dive instruments. It isn’t trying to be heritage-laden or luxury-adjacent. It’s a straightforward, stainless steel, quartz diver-styled watch that often sells for under $200 AUD.
And that’s precisely why it deserves a proper, sober look.
The Basics — What You Actually Get
On paper, the Duro offers more than many watches at twice the price:
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Case size: 48.5 × 44.2 × 12.1 mm
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Weight: 92 g
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Water resistance: 200 metres (20 bar)
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Case material: Stainless steel
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Bezel: Aluminium insert, anti-reverse (unidirectional)
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Crown & caseback: Screw-down crown, screw-lock back
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Crystal: Mineral glass
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Movement: Japanese quartz (±20 seconds per month)
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Battery: SR626SW, approx. 3 years
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Lug width: 22 mm
It’s a simple three-hand layout with date at 3 o’clock, strong lume application, and clear dial printing. No applied indices, no ceramic bezel, no sapphire crystal. Just the fundamentals.
MDV-106 vs MDV-107 — What Changed?
The original MDV-106 became something of a cult classic, largely thanks to one small detail: the marlin logo above 6 o’clock. It gave the watch personality and, unintentionally, collectability.
In many regions, Casio replaced it with the MDV-107, which removes the marlin logo and makes minor dial adjustments. Functionally, the watches are near identical. Same dimensions. Same movement. Same 200m rating.
The difference is emotional rather than technical. Some buyers prefer the cleaner dial of the 107. Others actively seek out the 106 for the marlin.
From a practical standpoint, either will serve you equally well.
Case & Proportions — Big but Wearable
At 44mm wide, this is not a small watch. On paper, it sounds oversized for many wrists.
In reality, the relatively modest 12.1mm thickness and restrained lug-to-lug measurement help it wear better than expected. The case profile is uncomplicated — brushed surfaces with some light polishing — and there’s nothing sharp or overly aggressive about it.
It looks like a dive watch because it follows dive watch geometry. Broad bezel. Strong shoulders. Clear dial hierarchy.
If you’re used to 40mm sports watches, this will feel large. If you’re accustomed to modern Seiko or Citizen divers, it will feel normal.
The Bezel & Crystal — Where Costs Are Managed
The aluminium bezel insert is honest. It won’t resist scratches like ceramic, and it doesn’t pretend to. The action is serviceable — not luxury smooth, but secure enough for timing tasks.
The mineral crystal is another practical choice. At this price point, sapphire would be unrealistic. Mineral is tougher than acrylic, easier to replace than sapphire, and perfectly adequate for daily wear if you’re not abusing it.
This is where Casio has made sensible cost decisions. Nothing feels fraudulent. It feels appropriately priced.
The Movement — Quartz Without Apology
The Duro runs a Japanese quartz movement rated at ±20 seconds per month with hacking seconds and a three-year battery life.
There’s a tendency in enthusiast circles to dismiss quartz automatically. That misses the point here.
This is a grab-and-go watch. It will:
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Start instantly.
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Stay accurate.
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Require no regulation.
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Survive neglect.
For someone who rotates watches, travels frequently, or simply wants something reliable for swimming and beach wear, quartz makes practical sense.
The Duro isn’t trying to sell romance. It’s selling dependability.
Water Resistance — The Important Detail
At 200 metres, with a screw-down crown and screw-lock caseback, the Duro is legitimately capable for swimming, snorkelling, and recreational water use.
It is not ISO-rated as a professional dive watch, and Casio does not market it as such. That distinction matters.
But for the average Australian who wants a surf, pool, or weekend coastal watch — it is more than adequate.
The confidence here comes not from certification, but from Casio’s broader reputation for building watches that simply survive.
Variations — More Than Just Black
The classic MDV-106-1A (black dial, black bezel) is the most recognisable. But the range extends further:
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Blue dial versions
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“Pepsi” red/blue bezel variants
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Green dial models
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Gold-accented options
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Metal bracelet versions such as the MDV106DD
These variations allow the watch to shift personality. On resin, it feels tool-focused. On a steel bracelet, it feels closer to traditional diver styling. On a NATO, it becomes pure utility.
The 22mm lug width makes it one of the easiest watches to customise. And customisation arguably improves it.
Real-World Wear — Where It Wins
Where the Duro genuinely excels is in daily use.
It’s:
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Legible.
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Tough.
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Inexpensive enough that you don’t baby it.
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Heavy enough to feel substantial.
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Simple enough to never frustrate you.
There is no power reserve anxiety. No concern about service costs. No stress about wearing it to the beach.
It’s a watch you wear when you don’t want to think about the watch.
That has value.
Where It Falls Short
Balanced evaluation matters.
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The bezel insert will scratch.
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The mineral crystal is not premium.
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The stock resin strap is functional but uninspiring.
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Finishing is industrial, not refined.
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It is large for smaller wrists.
If you’re looking for refinement, heritage finishing, or mechanical interest, this is not the watch.
If you’re looking for a luxury diver alternative, it won’t satisfy that itch.
Industry Context — Why It Matters
In a market flooded with microbrands offering NH35 automatics for $400–$600 AUD, the Duro quietly asks a simple question:
Do you really need more?
For under $200, you receive:
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200m water resistance
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Solid stainless steel case
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Reliable quartz movement
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Recognisable brand backing
There’s an argument that the Duro has become the benchmark for value in entry-level dive-style watches. Many watches cost more because they can — not because they must.
Casio’s scale allows it to offer something honest at a price that undercuts most competition.
Final Thoughts — Underrated or Just Sensible?
Calling the Casio Duro “the most underrated watch in the world” might be dramatic.
But it is unquestionably one of the most sensible.
The MDV-106 remains desirable for the marlin logo and cult following. The MDV-107 continues the formula in a cleaner, updated form. The broader range offers enough variety to suit different tastes without changing the core identity.
It’s not aspirational.
It’s not luxurious.
It’s not rare.
It’s dependable, affordable, and quietly competent.
In an industry increasingly driven by hype cycles and artificial scarcity, that alone makes it worth paying attention to.
For many Australians wanting a reliable beach watch, a weekend sports watch, or simply a robust everyday piece — the Casio Duro remains difficult to beat.
Not because it’s exciting.
But because it works.
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