| Name | Keuffel & Esser < 4097 C > Variant |
| Front Scales | A = B CI C = D K |
| Back Scales | 5inch = S L T = 13cm ? |
| Type of Rule | slide rule |
| Material | |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 4762 |
| Comment | |
| Thumbnail |  |
| Name | Keuffel & Esser < 4097 C > Variant |
| Front Scales | A = B CI C = D K |
| Back Scales | 5inch = S L T = 13cm ? |
| Type of Rule | slide rule |
| Material | |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 4762 |
| Comment | |
| Thumbnail | |