Vintage Casio SF-3905A Digital 128kb (Memory) Diary Very Nice Tested + | eBay
Casio - SF-6500SY - - Digital Diary - Casio SF6500SY - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
File:Casio digital diary SF-9350.jpg - Wikimedia Commons
Casio - SF-R20 - - Digital Diary - Casio SFR20 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA