Calculating Machine Gallery
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Johann Jacob Sauter, calculating machine, 1796. Brass, steel, wood. Including a handwritten manual i
Marcello Nizzoli, adding machines: 1/ Olivetti Summa 15, 1949 2/ Olivetti Multisumma 20, 1964 3/ Su
These illustrations come from the first book about a calculating machine written in English, and are
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