This stepped drum manual non-printing calculating machine is of English manufacture. It represents an improvement of the arithmometer invented by the Frenchman Charles Xavier Thomas in the 1820s and ...
This relatively late English-built arithmometer represents C. & E. Layton's improvements to the machine originally designed by Samuel Tate. The stepped drum manually operated non-printing calculating ...
Im Heft 97 der Zeitschrift Historische Bürowelt vom September 2014 weist nun Valéry Monnier aus Osny (Frankreich) nach, dass die Datierung irrtümlich ist und dass Maschine und Gehäuse nicht zusammen ...
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