| Faber-Castell 67/91 | |
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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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Pouch |
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| Length | 15 cm |
| Number of scales | 8 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1957 |
| Status of the slide rule | Slightly damaged (small chip from top right corner) |
| Material of the slide rule | Plastic |
| Type of cursor | Clear Plastic |
| Status of the pouch | Normal signs of use |
| Status of the manual | None |
| Collection number | 139 |
| Further comments | One of the most simple slide rules. It was used as a business gift by Bauingenieur Bernhard Schmäing, Betonwaren- und Kunststeinfabrikation, Duisburg-Hamborn.
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