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VTG 1940-1950s Keuffel &Esser Co.N.Y. Polyphase Mannheim Simplex Slide Rule 4054 For Sale

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VTG 1940-1950s Keuffel &Esser Co.N.Y. Polyphase Mannheim Simplex Slide Rule 4054:
$39.00

Vintage 1940-1950th Keuffel &Esser Co. N.Y. mahoganylinear Polyphase Mannheim Simplex Slide Rule 4054 in good for age condition aspictured. S/N 240359

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