| Country of Origin | United States |
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Check the listing for details. Vintage K&E Polyphase Slide Rule 4053-3 Leather Case Made in USA 10". Condition: Used, Made in United States. Listed at 19.79 USD. Storage case shows wear and staining, but did a nice job of protecting the rule. You will receive the item shown, in the condition shown. - Nice example of a Model 4053-3, with storage case. The Reverse has data and formulas, as shown.