Rhodri Marsden on Twitter: "Let's hear it for the Casio fx-85 solar powered calculator, just discovered in a box in the loft and still working perfectly 35 years after it was bought.
CASIO FX 82A Vintage Scientific Calculator Fully Working - PicClick IT
CASIO FX 82A Vintage Scientific Calculator Fully Working - PicClick IT
Casio FX-600 - Retro-Electronic 1980-99
Vintage Casio FX-82A Scientific Calculator- Tested & Working with slip case | eBay
Virtual Museum of Calculators
Casio - fx-82A - - Scientific calculator - Casio fx82A - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA