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calculadora casio fx-31 scentific calculator - Buy Other Vintage Objects at todocoleccion - 47914035
![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 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](https://preview.redd.it/rsyij284u5541.jpg?width=640&crop=smart&auto=webp&s=d1f35a45e44c19adc54c3f9b2f270e4fb790a018)
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
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Casio - fx-31 - - Vintage calculator - Casio fx31 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
![Two NOS Casio F-31's if you have ons share it, I've never seen anyone else display one!! I had 3 but sometimes you've got to let one go to friends! : r/casio Two NOS Casio F-31's if you have ons share it, I've never seen anyone else display one!! I had 3 but sometimes you've got to let one go to friends! : r/casio](https://preview.redd.it/e07841vzvik31.jpg?auto=webp&s=195d5def0ab8ea68a065d20352ed21e9cae5e628)
Two NOS Casio F-31's if you have ons share it, I've never seen anyone else display one!! I had 3 but sometimes you've got to let one go to friends! : r/casio
![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 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](https://preview.redd.it/rsyij284u5541.jpg?auto=webp&s=c7927051f3854afd023b756f9e4cab3215562761)