| Name | Keuffel & Esser < N 4053 - 3 > Variant |
| Front Scales | 10inch / A = B CI C = D K ] 25cm |
| Back Scales | = S L T = |
| Type of Rule | slide rule |
| Material | wood/celluloid |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 4581 |
| Comment | |
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