| Faber-Castell 55/91 | |
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Front |
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Back |
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Front without slide |
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Back of the slide |
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Box |
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| Length | 30 cm |
| Number of scales | 7 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | |
| Status of the slide rule | Near mint |
| Material of the slide rule | Wood |
| Type of cursor | Celluloid |
| Status of the box | Near mint |
| Status of the manual | None |
| Collection number | 51 |
| Further comments | One of the range of school slide rules that Faber-Castell produced in the first half of the 20th century. This one is interesting because it doesn't have a layer of celluloid. |
