| Name | Blundell TR 53 (Traction Engineers) |
| Front Scales | LL1 A = B CI C = D LL2 |
| Back Scales | ?V1 ?V2 T F V S1 S2 |
| Type of Rule | slide rule |
| Material | PVC |
| Dimension (mm) | |
| Area of Use | log/tech |
| Origin of Rule | brochure |
| Match Number | 2991 |
| Comment | |
| Thumbnail | No Picture |