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1936 Keuffel & Esser 4097C Ever-There Simplex Slide Rule W Box & Instructions
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Condition
Used
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ZIP 975**
itsgottago49
435 ratings · 98.20% positive
Description
From the sellerThis slide rule, known for its durability and precision, was popular among professionals and students in the fields of engineering and mathematics. Don't miss your chance to own this cool piece.
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