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The Olivetti Summa 19: the last mechanical calculator - Italian Ways | Tech design, Design classes, Memphis design
![office, office equipment, calculator, Olivetti, typ "Summa Prima 20", design by Marcello Nizzoli, built by Natale Capellaro, Italy, 1960, Additional-Rights-Clearences-Not Available Stock Photo - Alamy office, office equipment, calculator, Olivetti, typ "Summa Prima 20", design by Marcello Nizzoli, built by Natale Capellaro, Italy, 1960, Additional-Rights-Clearences-Not Available Stock Photo - Alamy](https://c8.alamy.com/comp/DB55AB/office-office-equipment-calculator-olivetti-typ-summa-prima-20-design-DB55AB.jpg)
office, office equipment, calculator, Olivetti, typ "Summa Prima 20", design by Marcello Nizzoli, built by Natale Capellaro, Italy, 1960, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
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