Summa Prima 20 adding machine

Details
Object number
AIBDC : 008244
Country
Date
1960 - 1969 (circa)

Description

An Olivetti Summa Prima 20 adding machine, made in Italy circa,1960s and designed originally in 1949 by Marcelo Nizzoli, who was chief designer for Olivetti for a number of years. The manually operated push button keyboard is laid out for pre-decimal operation and has add, subtract, sub-total and total functions. The base and mechanism are made from pressed metal, the buttons and cover are made from ABS (?). The calculations and total are displayed on a printed paper roll which is struck by metal keys, through an inked ribbon, in the manner of a typewriter.
Designers & Manufacturers
Designer (Person)
Manufacturer

Inscriptions

printed: "olivetti. Made in Italy" (label on top of cover)
printed: "summa PRIMA 20 OLIVETTI. mADE IN iTALY. Fabrique en Italie" (back of case, below printer roll)
Dimensions
Width
240mm
Height
145mm
Depth
350mm
Method
Colour