CALCOLATRICE OLIVETTI LOGOS 814T Funzionante Usata EUR 10,00 - PicClick IT
File:Olivetti, summa 15, calcolatore meccanico con scrivente, 1949 (1956).jpg - Wikimedia Commons
Calculator Olivetti ELETTROSUMMA 22 of 1958 Old Calculator Italy Metal Ver. | eBay
Olivetti Summa Prima 20 - Wikipedia
computer / electronics, computer, calculating machine Olivetti Summa 19, with integrated printer, design Ettore Sottsass and Hans von Klier, Italy, 1969, Additional-Rights-Clearences-Not Available Stock Photo - Alamy