| Faber-Castell 390 | |
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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 of the slide |
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Box |
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| Length | 15 cm |
| Number of scales | 10 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1942 |
| Status of the slide rule | Near mint |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Very special aluminium with glass cursor, wit an indicator at the bottom of the slide rule for the 3 decades log scale. |
| Status of the box | Normal signs of use |
| Type of box | |
| Status of the manual | None |
| Collection number | 56 |
| Further comments | This 390 has a rahter simple scale
arrangement with the exception of the 3 decade log scale at the bottom
that puzzles me. Such a scale I have only seen on some of the electrical
slide rules of Faber-Castell. On the back one of the owners has carved his initials: S.H. |
