| Country of Origin | United States |
|---|
Check the listing for details. #4054 Polyphase Keuffel & Esser K&E 4054 Polyphase Slide Rule & Case. Condition: Used, Made in United States. Listed at 18.99 USD. Keuffel & Esser K&E 4054 Polyphase Slide Rule. Mahogany body w/celluloid laminate face.
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