The Curta calculator, a small cylindrical
math machine with a hand-crank on the top, was first dreamt up by Curt Herzstark
in the 1930s who finished its design while imprisoned in the Buchenwald concentration camp during WWII. With its unique design and fascinating history, these antiques can sell for well over $1,000 today. Don't have $1,000 to drop on one? Good news, you can 3D print it too.
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