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Keuffel & Esser slide rule, 4090-3, with case $8.49 USD Sold on: 2014-Jan-02 Marketplace: eBay  1 Treasure 0 Trash   100% Detail:You are bidding on 1 Keuffel & Esser slide rule, 4090-3, with case. Rule in good condition, needs cleaning. Case shows use.  More Relevance Historical Items |
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