Smartwatch - The Verge
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Casio Databank - Wikipedia
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What is the difference between a wristwatch and a pocket watch? Which one is more expensive in terms of collectibles/antiques? Why? - Quora
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The original smartwatches: Casio's history of wild wrist designs
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Casio Databank - Wikipedia
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Smartwatch - The Verge
The original smartwatches: Casio's history of wild wrist designs - The Verge