| Name | Graphoplex S 641 Log Log Variant |
| 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 | 1317 |
| Comment | |
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