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Casio CA-53 Calculator Watch - My In Depth Review of a Classic Which is Still Available Brand New - YouTube
Casio Men's Watch Ca-53w Multifunction Calculator Casio Calculator Men's Watch Rubber Band - Digital Wristwatches - AliExpress
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Casio CA-50 & CA-53w] Marty's Casio vs. the one still sold to this day. : r/Watches