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CASIO CD-401 1984 VINTAGE ORIGINAL DATABANK WATCH MODULE 246 New battery | eBay
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Casio Databank - Wikipedia
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RARE Vintage 1984 Casio CD-401 FIRST DATA BANK Calculator Watch Japan Mod. 246 | WatchCharts
Casio CD-401 Data Bank - A l'heure d'Emilie
Casio CD-401 1984 Vintage Original DataBank Watch Module 246 New Battery Japan – Full On Cinema