Casio fx 31. Dad bought this during his college days in 1978. Running flawlessly since 41 years now. I use it sometimes when I'm bored of using my phone. : r/BuyItForLife
Milanuncios - calculadora antigua casio fx-19
Casio FX-19 Calculator from Retrogames
Casio - fx-19 - - Vintage calculator - Casio fx19 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
Casio FX- 260 Solar II Scientific Calculator, LCD Display, Black - Walmart.com