| Faber-Castell 1/87 System Rietz (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 | 29 cm |
| Number of scales | 11 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | September 1945 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Celluloid. |
| Status of the box | Normal signs of use |
| Status of the manual | None |
| Collection number | 97 |
| Further comments | The 1/87 is one of the most common
Faber-Castell slide rules. Remarkable of this one is that it has a
celluloid cursor, instead of the normal aluminium with glass one. I
first thought that the cursor came from one of the cheaper school slide
rules. It fits perfectly though. Another explanation might be that at
the end of WW-II there was a aluminium shortage, so-that they were
forced to use celluloid. I have another 1/87 from January 1946 (catalog number 53) that shows some remarkable differences from this specimen: it has a metal cursor, the extensions of the ABCD scales and the I scale are printed in red and it has a 1:25 scale on the bottom side. |
| Faber-Castell 1/87 System Rietz (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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| Length | 30 cm |
| Number of scales | 12 |
| Country of origin | UK |
| Country of manufacturing | Germany |
| Year of manufacturing | 1965 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Clear plastic |
| Status of the box | Normal signs of use |
| Status of the manual | None |
| Collection number | 79 |
| Further comments | This is an English version with an inch-scale on the top and a cm-scale on the bottom. |
| Faber-Castell 1/87 System Rietz (Variation 3) | |
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Back |
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Bottom |
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| Length | 30 cm |
| Number of scales | 12 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1965 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Clear plastic |
| Status of the box | Normal signs of use |
| Status of the manual | None |
| Collection number | 12 |
| Further comments | This is the German variation of variation 2.On the bottom is a 1:25 scale. |
