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| XxX calculator | | Seidel&Naumann (Dresden), 1906 | Dimentions: 50 x 22 x 14 cm
Capacity: 9 (w cr) x 8 (w/o tc) x 13 also 9 x 9 x 16 and 11 x 11 x 20
Weight: 11 kg
Colour: black/silver
| | The working principle of the XxX calculator is stepped drum. It represents an early attempt of proper designing and serially producing this kind of machines. | | |
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