File:Comptometer ad 1917 (9).png
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Size of this preview: 430 × 599 pixels. Other resolutions: 172 × 240 pixels | 344 × 480 pixels | 551 × 768 pixels | 735 × 1,024 pixels | 2,052 × 2,858 pixels.
Original file (2,052 × 2,858 pixels, file size: 2.69 MB, MIME type: image/png)