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VTG Casio Digital Diary SF-3905Abu-s Backlit Display/ No Front Cover, AS IS | eBay
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casio backlight display digital diary SF-4700L (not tested) | eBay
Casio Digital Diary SF-3600 BK-S NEW | eBay
Casio Digital Diary SF-4985ER BU-S 256KB Memory Multi-lingual - New Batteries | eBay