{"product_id":"keuffel-esser-co-polyphase-slide-rule-tool-science-engineer-medicin-30s-calcul","title":"Keuffel Esser Co. Polyphase slide rule tool Science Engineer Medicin 30's Calcul","description":"\u003cdiv class=\"WaaZC\" style=\"color: rgb(230, 232, 240); font-family: \" google=\"\" sans roboto arial sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cdiv class=\"RJPOee EIJn2\" style=\"animation: auto ease 0s 1 normal none running none !important;\"\u003e\u003cdiv class=\"rPeykc uP58nb MNX06c\" data-hveid=\"CAMQAQ\" data-ved=\"2ahUKEwjW4P3-vfKSAxUXLVkFHZ30Ng0Qo_EKegQIAxAB\" style=\"margin: 0px 0px 10px; line-height: 24px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003eKeuffel Esser Co. Polyphase slide rule tool Science Engineer Medicin 30's Calculating tool\u003c\/p\u003e\u003cp\u003eEra: Produced around 1882 to the mid-20th century.\u003c\/p\u003e\u003cp\u003eType: Duplex slide rule featuring logarithmic scales for multiplication, division, roots, and trigonometry.\u003c\/p\u003e\u003cp\u003eCollector Status: Considered a rare and highly collectible mathematical instrument\u003c\/p\u003e\u003cp\u003eselling as pictured.   \u003c\/p\u003e\u003cp\u003emore than welcome to pick up at shop in butler pa \u0026amp; save shipping.\u003c\/p\u003e\u003cp\u003e022226 cg\u003c\/p\u003e","brand":"cyclewarehouse.online","offers":[{"title":"Default Title","offer_id":46619074789538,"sku":"Keuffel Esser Co #2   022226","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0335\/9824\/2861\/files\/img2174_3ebc16c5-f409-437c-ab0c-52958366cc0c.jpg?v=1771950396","url":"https:\/\/cyclewarehouse.online\/products\/keuffel-esser-co-polyphase-slide-rule-tool-science-engineer-medicin-30s-calcul","provider":"cyclewarehouse.online","version":"1.0","type":"link"}