A gift from my Calculus teacher upon graduation.

Yes manual included. Sadly the 0 (zero) button no longer works, due to battery corrosion… ☹️

    • over_clox@lemmy.worldOP
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      2 months ago

      Already said that in my original post, but thank you Mr Quicksand!

      I might manage to fully fix it one day, I think it’s a corroded via.