Curta I
"The Curtas were marvels of mechanical miniaturization which were introduced by Contina Ltd. in 1948. They were designed by Curt Herzstark while he was a prisoner in a concentration camp. Herzstark worked out the basic design in his head and polished it on paper when he was released in 1945. Herzstack's design was based on the stepped drum mechanism but with a brilliant adaptation that allowed a remarkably simple and compact design. "

David Hicks.
Source: Museum of HP Calculators.

Courtesy of: Clive Faulks - ARTIFICE

X-Number World of Calculators