| Faber-Castell 20/66 Demegraph | |
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Front |
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| Length | 33 cm |
| Number of scales | N.v.t. |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Clear plastic |
| Type of cursor | None |
| Status of the box | None |
| Status of the manual | None |
| Collection number | 119 |
| Further comments | I still have to sort out exactly how this device works. It is not a real slide rule, but some kind of device to count/measure typeface. |
