| Faber-Castell 63/91 (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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Sleeve |
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Cross section |
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| Length | 15 cm |
| Number of scales | 6 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1938 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood. (No brass re-inforcement rods) |
| Type of cursor | Celluloid |
| Status of the box | Normal signs of use |
| Type of box | Nice leather sleeve |
| Status of the manual | None |
| Collection number | 76 |
| Further comments | This was a special version of the 63/91 made for Zeiss/Ikon. |
| Faber-Castell 63/91 (Variation 2) | |
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Front without slide |
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Sleeve |
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| Length | 15 cm |
| Number of scales | 6 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1930 |
| Status of the slide rule | Normal signs of use (slight chip off the top left) |
| Material of the slide rule | Celluloid on wood. (No brass re-inforcement rods) |
| Type of cursor | Celluloid |
| Status of the box | Normal signs of use |
| Type of box | Nice leather sleeve (with clip) |
| Status of the manual | None |
| Collection number | 200 |
| Further comments | Sleeves with a clip are rather rare. For the rest identical to variation 1. |
