The Casio SF-4000 ($109.95) is a "digital diary" with a large, six-line LCD screen that displays any full month… | Graphing calculator, Square roots, Digital diary
CASIO SF-4000 di seconda mano per 12 EUR su Madrid su WALLAPOP
Casio SF-4000 Digital Diary Vintage | eBay
Casio SF-4000 Manuals | ManualsLib
MyCalcDB : Calculator Casio SF-4000 aka DIGITAL DIARY