| Faber-Castell 51/94 System Rietz | |
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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 | 9 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Celluloid on wood (celluloid looks like white paint!) |
| Type of cursor | Celluloid |
| Status of the box | Normal signs of use |
| Type of box | Black carton |
| Status of the manual | None |
| Collection number | 37 |
| Further comments | This is one of the series of
inexpensive school slide rules (Schul-Rechenstab) that Faber-Castall
made. They do not have the manufacturing date imprinted on the
back. I am not able to date this rule yet. Looking at the box I would
estimate the 1930-1945 period. To be confirmed! The celluloid of this slide rule looks very cheap: more like a thick layer of white paint.
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