| Faber-Castell 2/66/d Demegraph | |
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Back |
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| Length | 33cm |
| Number of scales | No clear number due to the special nature of this slide rule |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | 1954 |
| Status of the slide rule | Normal signs of use |
| Material of the slide rule | Plastic |
| Type of cursor | Clear plastic |
| Status of the box | Normal signs of use |
| Type of box | Hinged box with soft fabric liner. Small locks on the side |
| Status of the manual | None |
| Collection number | 201 |
| Further comments | This slide rule is very rare. It is
the most complex one of the 66 series, specially developed for
typographers and printers. The rule is based on an invention of Mr. Schirmer. The patent number 804932 can be found in the patent section of my website. Interesting to notice that this 2/66/d is completely different from the 2/66. |
