| Name | Dargue Brothers Simplon Primary Log Log Variant |
| Front Scales | LU A = B CI C = D LL |
| Back Scales | |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 327x35x10 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 3126 |
| Comment | |
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