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Summa 19 calculator designed in 1970 by Ettore Sottsass for Olivetti.
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![Summa 19 calculator designed in 1970 by Ettore Sottsass for Olivetti. Search “[구로오피]+{{OPTIME19.COM}}+(오피타임)+구로오피+구로야구장+구로안마+구로OP+구로아로마+구로휴게텔+GUROOP” from What is Modern? and Olivetti at DAM](https://images2.dwell.com/photos/6063391372700811264/6133500179061235712/original.jpg?auto=format&q=35&w=160)