File:Arithrometer Calculator, ca. 1890 (CH 18650063).jpg
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![File:Arithrometer Calculator, ca. 1890 (CH 18650063).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Arithrometer_Calculator%2C_ca._1890_%28CH_18650063%29.jpg/800px-Arithrometer_Calculator%2C_ca._1890_%28CH_18650063%29.jpg?20171208045110)
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