| Name | Keuffel & Esser 4060 Cox's Patent |
| Front Scales | A = B C = D |
| Back Scales | A = BI CI = D |
| Type of Rule | slide rule |
| Material | |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 5804 |
| Comment | |
| Thumbnail |  |
| Name | Keuffel & Esser 4060 Cox's Patent |
| Front Scales | A = B C = D |
| Back Scales | A = BI CI = D |
| Type of Rule | slide rule |
| Material | |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 5804 |
| Comment | |
| Thumbnail | |