| Faber-Castell 309 Schulrechenstab | |
|
Front |
|
|
|
|
|
Back |
|
|
|
|
|
Front without slide |
|
|
|
|
|
Back of the slide |
|
 |
|
| Box | |
|
|
|
| Length | 30 cm |
| Number of scales | 9 |
| Country of origin | Germany |
| Country of manufacturing | Germany |
| Year of manufacturing | |
| Status of the slide rule | Little signs of use |
| Material of the slide rule | Celluloid on wood |
| Type of cursor | Celluloid |
| Status of the box | Heavily damaged |
| Type of box | Little signs of use |
| Status of the manual | None |
| Collection number | 33 |
| Further comments | One of the first inexpensive slide
rules for schools (Schulrechenstäbe). They all have celluloid cursors.
The celluloid looks different from the celluloid on the "normal" FC
slide rules. It more resembles a thick layer of paint than a layer of
celluloid. I still don't know how to date these school slide rules, as there is no production date on the back. |
