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Rechnerlexikon

Die große Enzyklopädie des mechanischen Rechnens

18.208.186.19 | Identification | Aide

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Diskussion:Underwood 200


According with Torchio (Ufficio d'epoca N. 50/2011) Olivetti introduced Summa Prima 20 in 1960. Capacity 10x11 and two operations. Then, in 1961, three reduced versions was produced, having the same restyled case:

Please note that in these years Antares and Underwood was owned by Olivetti. Celli 09:46, 12. Set 2011 (CEST)