Dos Casio G-shock Wademan DW-9800 de segunda mano por 145 EUR en Zaragoza en WALLAPOP
Calculadora gráfica de potencia a color Casio CFX -9800G con manual y caja (probada) | eBay
MUSEO DE LA CALCULADORA GRÁFICA (SALA 2)
TI-Planet on Twitter: "An interesting history of calculators by @EdTech_K12, from adding machines to graphing calculators. Note the 1st color graphing calculator isn't the 2011 fx-CG20. Still by Casio but long before,