Sceintific Calculator BL-82MS Black Calculator, Size: 9 X 3 X 17 Cm
File:Casio fx-31 with case and manual.jpg - Wikimedia Commons
Casio - The small scientific series - - Vintage calculator - Casio The small scientific series - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB
Casio fx-17 Vintage Scientific Desk Calculator 14.8x8.7cm Made in Japan | eBay