Olivetti Quanta calculator

A calculator from Olivetti, 1961

Olivetti Quanta The Olivetti OUANTA is a portable, writing electric adding machine. It adds, subtracts, calculates negative balances, and multiplies by successive additions, writing the terms and results for each operation. It is the ideal adding machine for shops, agencies, offices, merchants, artisans, and administrators. It provides partial and general totals; using the repeater, it can add or subtract the same number multiple times in succession; it has a device for writing reference numbers, dates, and serial numbers in non-calculating mode; it can calculate discounts and surcharges, perform cash checks, and compile the various items on an invoice.