Olivetti Summa Prima 20

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Olivetti Summa Prima 20 mechanical adding machine . Made in Italy, around 1960 , original design by Marcello Nizzoli in 1949. The keyboard includes special keys for "10" and "11", for working in pounds, shillings and old pence. Prints the answers on to a small roll of paper using black ink for addition and red ink for subtraction

12cm high / 23cm wide / 38cm deep / 4.1 kilograms

Manufacturer: Olivetti
Date: 1966

Other Systems Related To Olivetti Summa Prima 20:

Item Manufacturer Date
Olivetti Elettrosumma 22 Olivetti 1958
Olivetti Summa Prima 20 (pre-decimal) Olivetti 1961
Olivetti Summa Quanta 20 Olivetti 1972
Olivetti Logos 9 Calculator Olivetti 1980

This exhibit has a reference ID of CH6012. Please quote this reference ID in any communication with the Centre for Computing History.

 

Olivetti Summa Prima 20


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