Casio FX82 calculator I bought in 1982 at the age of 15. Used it throughout school, my apprenticeship and work as a draughtsman. Don't use it much now but it still works
Casio FX 82 DE X + Schutztasche + Fachbuch: Amazon.de: Koffer, Rucksäcke & Taschen
CASIO fx-82 SUPER. I bought it in 1.992, use it in college, at the university and 20 years more at the office. Never changed battery and im not going to retire it
Casio Scientific Calculator FX-82 Super Fraction Engineering Broken Hinge Cover | eBay
Bedienungsanleitung Casio FX-82SX (35 Seiten)
Casio FX-82 DE X ClassWiz Schulrechner - DynaTech
Solving Quadratic Equation on Casio fx-82ES Plus [Calculator Trick - 2022] - YouTube