| Name | Keuffel & Esser N 4053 - 5 Polyphase Mannheim Adjustable, with molded plastic back |
| Front Scales | 20inch / A = B CI C = D K \ 50cm |
| Back Scales | = S L T = |
| Type of Rule | slide rule |
| Material | Engine divided celluloid laminated mahogany |
| Dimension (mm) | |
| Area of Use | generic |
| Origin of Rule | Michael O'Leary |
| Match Number | 4138 |
| Comment | |
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