| Name | Dargue Brothers Simplon Primary Log Log |
| Front Scales | LU A = B CI C = D LL |
| Back Scales | |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 306x35x7 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 3073 |
| Comment | |
| Thumbnail |  |