TypeII-1 Curta. The Curta is a very cool machine, designed by Curt Herzstark while incarcerated in a Nazi concentration camp! This amazing little machine can add, subtract, divide, multiply, fit in your pocket, grind pepper, predict the weather, and unlike those boring electronic calculators, the Curta has ten billion moving parts!
Curta Mechanical Calculator, a small, hand-cranked mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.