Olivetti

Elettrasumma 20 #651178 (1974) Olivetti Olivetti Divisumma #1D130461 (1956-1964)

Ing. C. Olivetti & Co. S.p.A, Ivrea, Italy

The first Olivetti calculator was introduced in 1940. Natale Capellero  developed the mechanism and Marcelle Nizzoli (1887-1969) the exterior of the 1950s and 1960s Olivetti calculators.