Curta Type II Mechanical Calculator
A Type II Curta mechanical calculator, made in Lichtenstein by Contina AG. A larger version with more registers than the Type I., but with the same ingenious handheld design.
Tag: calculator
Curta Type I Mechanical Calculator
A Type I Curta handheld mechanical calculator, the smallest mechanical calculator ever made – designed by Kurt Herzstark in the Buchenwald concentration camp, he survived because the Nazis wanted to present his invention to Hitler after the war.
Nuclear Weapon Effects Computers
A couple of circular slide rule calculators, used to work out the damage, casualties and exposure effects from nuclear weapons. Dating from the 1960s, these were probably used by the Royal Observer Corps.