| Faber-Castell 1/48 System Dr. Winkel (variation 1) | |
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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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| Bottom | |
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Box |
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| Length | 29 cm |
| Number of scales | 12 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1947 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Glass is broken |
| Status of the box | Near mint |
| Status of the manual | None |
| Collection number | 134 |
| Further comments | This is one of the special Dr. Winkel
slide rules for metalworkers. I do not know yet how the slide rule
actually works.
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| Faber-Castell 1/48 System Dr. Winkel (variation 2) | |
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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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| Bottom | |
 |
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|
Box |
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|
|
|
| Length | 29 cm |
| Number of scales | 12 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 50-ies |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Plastic on wood |
| Status of the box | Normal signs of use |
| Status of the manual | Used (German) |
| Collection number | 158 |
| Further comments | |
