{"product_id":"vintage-k-e-4181-1-log-log-duplex-decitrig-slide-rule-usa","title":"Vintage K\u0026E 4181-1 Log Log Duplex Decitrig Slide Rule (USA)","description":"Own a piece of engineering history with this vintage Keuffel \u0026amp; Esser 4181-1 Log Log Duplex Decitrig slide rule. Copyrighted in 1947, this American-made instrument was the standard for precise calculations before the age of digital calculators. It's in good working condition, with all scales clear and the slide moving smoothly. This slide rule is perfect for collectors, engineers, or anyone who appreciates the art of analog computation. It comes complete with its original, distinctive orange leather case to protect your investment.","brand":"Keuffel \u0026 Esser","offers":[{"title":"Default Title","offer_id":48122766590176,"sku":null,"price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/2560\/9952\/files\/download_9e3a6ab3-a3fb-4e17-849c-82d5779bdd7c.jpg?v=1763109260","url":"https:\/\/gearuptradingco.com\/products\/vintage-k-e-4181-1-log-log-duplex-decitrig-slide-rule-usa","provider":"Gear Up Trading Co. ","version":"1.0","type":"link"}