| Name | Graphoplex S 641 Log Log |
| Front Scales | 27cm / L K P SRT A = B T<45ΓΈ S CI C = D LL3 LL2 LL1 |
| Back Scales | |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 295x56.4x5.5 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 1316 |
| Comment | |
| Thumbnail |  |