| Name | Thornton PIC P 251 Standard |
| Front Scales | A = B CI C = D |
| Back Scales | 25cm K DF = CF CI C = D A 10inch |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 359x51x5 |
| Area of Use | generic |
| Origin of Rule | |
| Match Number | 2555 |
| Comment | |
| Thumbnail | No Picture |