| Faber-Castell 389 (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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| Box | |
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| Length | 12 cm |
| Number of scales | 9 |
| Country of origin | UK |
| Country of manufacturing | Germany |
| Year of manufacturing | 1932 |
| Status of the slide rule | Signs of normal use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Metal with glass |
| Status of the box | Signs of normal use |
| Status of the manual | None |
| Collection number | 252 |
| Further comments | Tiny slide rule. The cross section is
like the larger FC slide rules, without the metal reinforcements.
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| Faber-Castell 389 (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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| Box | |
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| Label | |
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| Length | 12 cm |
| Number of scales | 9 |
| Country of origin | USA |
| Country of manufacturing | Germany |
| Year of manufacturing | 1923 |
| Status of the slide rule | Signs of normal use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Metal with glass |
| Status of the box | Signs of normal use |
| Status of the manual | None |
| Collection number | 251 |
| Further comments | At first sight the variations are
identical. On close examination one can see all kinds of differences. The label of the dealer is still on the box: "Josef Oettgen Schreibware, Köln am Hof 1". The name of the owner is apparently C. Wilson.
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