| Faber-Castell 52/80 Mentor | |
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Front |
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Back |
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Box |
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| Length | 32 cm |
| Number of scales | 11 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1973 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Plastic |
| Type of cursor | |
| Status of the box | Normal signs of use |
| Status of the manual | None |
| Collection number | 102 |
| Further comments | On the box is a decal of from one of
the previous owners: Privatschule Paykowski in Herne:
Notice also the smalle arrows with figures below the D-scale. |
| Faber-Castell 52/80 (variation 1) | |
| This variation is identical to the previous one, except for the backside. It has 2 strange scales on the back. | |
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Back |
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| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1974 |
| Status of the slide rule | Mint |
| Material of the slide rule | Plastic |
| Type of cursor | |
| Status of the box | Mint |
| Status of the manual | None |
| Collection number | 106 |
| Faber-Castell 52/80 Mentor (var 2) | |
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Front |
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Back |
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Box |
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Outer box |
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| Length | 32 cm |
| Number of scales | 11 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1970 |
| Status of the slide rule | Near mint |
| Material of the slide rule | Plastic |
| Type of cursor | Clear plastic |
| Status of the box | Near mint |
| Status of the manual | Mint (German) |
| Collection number | 27 |
| Further comments | The front is slightly different from the first variation. The box is different. |
