| Name | Blundell 904 Academy |
| Front Scales | ST A = B CI C = D S T |
| Back Scales | K L DF = CF CIF C = D LL2 LL3 |
| Type of Rule | slide rule |
| Material | PVC |
| Dimension (mm) | 319x37x4.3 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 542 |
| Comment | |
| Thumbnail |  |