| Faber-Castell 20/45 | |
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Inside |
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Outside |
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| Length | 34 cm |
| Number of scales | N.R. |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 19-sixties? |
| Status of the slide rule | Near mint |
| Material of the slide rule | Plastic+metal slides |
| Type of cursor | N.R. |
| Status of the box | Normal signs of use |
| Type of box | N.R. |
| Status of the manual | None |
| Collection number | 99 |
| Further comments | This is a special calculator to
calculate biorythms based on the day of birth. It is unclear why and for
who FC made this calculator.On the bottom of the box you can find an
extensive manual to use this calculator. The box of the 20/45 is very similar to the boxes used by FC in the late sixties, early seventies for e.g. the 2/83N. |
