SpecStudio
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Casio B640
Ref. B640 · Sport
$80Stock unknown
Case
- Diameter
- 35mm
- Thickness
- 9.4mm
- Lug-to-lug
- 38.9mm
- Material
- Resin
- Water resistance
- 50m
Crystal & dial
- Crystal
- Acrylic
- Dial colour
- Black
Movement
- Type
- Quartz
Design language
- Case shape
- rectangular
- Dial style
- matte
- Bezel
- fixed
- Bracelet
- lug-attached
- Hands
- baton
AI-detected from the product image
Casio collection · 40 watches
3 colorways
The market
Market prices.
Retail$80
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Closed · 90d0Asking-price history
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Retail stock & market context
Casio on the secondhand market
Not enough to call it
-4.7% to +18.7% · 54 matched watches
Year-by-year readings →The connection engine
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The community take
Owners talk.
Owners widely praise the Casio B640 for its retro aesthetic, useful stopwatch and timer functions, and value proposition. Many appreciate its compact 35mm size and comfortable wearability, with one owner finding its module superior to over 15 other retro Casios due to responsive buttons and mode retention. However, some users note the case is plastic despite a metal band, and the original bracelet can feel flimsy, peel, or pull hairs, leading some to opt for aftermarket bands. One owner reported significant paint fading after two years of daily wear. Overall, owners rate the Casio B640 highly for its retro look and useful features at an accessible price point.
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