| Faber-Castell 57/74 System Schirdewan | |
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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 | 29,5 cm |
| Number of scales | 11 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1967 |
| Status of the slide rule | Mint |
| Material of the slide rule | Plastic |
| Type of cursor | Clear plastic, double width. |
| Status of the box | Normal signs of use |
| Type of box | Clear plastic |
| Status of the manual | None |
| Collection number | 129 |
| Further comments | This is a very rare specimen of one
of the several special purpose slide rules of Faber-Castell. The System
Schirdewan slide rules were used in the textile industry. The manual can
be found on the back of the slide rule. Very special is the double width cursor.
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