File:Writing ball keyboard.jpg
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Writing_ball_keyboard.jpg (302 × 353 pixels, file size: 119 KB, MIME type: image/jpeg)
The keyboard of a writing ball, seen from above. Rasmus Malling-Hansen invented this writing machine in 1865. Also called the Hansen writing ball.
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|current||13:36, 19 October 2006||302 × 353 (119 KB)||Sverre avnskog||The keyboard of a writing ball, seen from above. Rasmus Malling-Hansen inveted this writingmachine in 1865. Also called the Hansen writing ball.|
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