Mechanical Calculator and screw fastened lidded case, by Curta - Type II, 1950, made by Contina Limited, in Mauren, Liechtenstein (not Lichtenstein) Curta model II Mechanical Calculator and screw fastened lidded case 1950
Stripped model of a "Curta" pocket calculating machine with cylindrical metal case Stripped model of a "Curta" pocket calculating machine with cylindrical metal case 1950-1951