Name | Keuffel & Esser N < 4053 - 5 > Polyphase Mannheim Adjustable Dated 1923 |
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 | 4686
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