K+E Keuffel & Esser Slide Rule

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K+E Keuffel & Esser Slide Rule. I can’t find a model number for this rule. T is a patent number, 2,534,695. This rule is 7 inches long and 1 ½ wide. Comes with original leather case. Please see my other K+E Keuffel & Esser items up for sale. If you would like additional pictures please let me know. Any questions, please ask. SHIPPING COST: I will be shipping this item by United States Postal Service, Priority Mail. SHIPPING: I will ship within 48 hours of payment. If you would prefer me to ship a different way than noted, please let me know before making payment. I can ship United States Postal Service or UPS. I am not responsible for items once they leave my hands, so please let me know if you would like to have your item insured. I’m happy to combine shipping on multiple items. PAYMENTS: Payment must be received within 5 days from the end of auction. I accept If payment is not received by the 5 th day, the auction will be re-listed and appropriate feedback will be left. All sales are final.