{"product_id":"vintage-slide-rule-ll1-ll2-ll3-log-log-scale-with-cursor-engineering-architect-calculating-tool","title":"Vintage Slide Rule LL1 LL2 LL3 Log Log Scale with Cursor – Engineering\/Architect Calculating Tool","description":"\u003ch2\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA vintage slide rule featuring advanced log-log scales (LL1, LL2, LL3), designed for engineering and scientific calculation prior to the widespread use of electronic calculators.\u003c\/p\u003e\n\u003cp\u003eThis example is constructed with a dual-rail frame and a clear sliding cursor, allowing for precise alignment across multiple scales. The inclusion of log-log scales indicates it was intended for more advanced calculations, including exponential functions and higher-level mathematical work, rather than basic student use.\u003c\/p\u003e\n\u003cp\u003eHoused in its original fitted case, the piece presents well both as a functional instrument and as a display item. The scales remain legible, and the cursor moves smoothly across the rails. Light wear is present consistent with age, but overall condition is clean and intact.\u003c\/p\u003e\n\u003cp\u003eSlide rules like this were essential tools for engineers, architects, and technical professionals throughout the mid-20th century, representing a pre-digital era of analog precision and craftsmanship.\u003c\/p\u003e\n\u003cp\u003eA strong example for collectors of scientific instruments, engineering tools, or mid-century technical design.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eFeatures \u0026amp; Details\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; height: 254.719px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 17.5723%; height: 19.5938px;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"width: 79.0306%; height: 19.5938px;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eSlide Rule \/ Engineering Calculating Instrument\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eEra\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003ec.1940s–1960s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eScales\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eLogarithmic + Log-Log (LL1, LL2, LL3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eFrame\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eDual-rail construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eCursor\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eClear sliding cursor for precision alignment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eMetal frame with printed scale inserts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eCase\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eOriginal fitted case included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eGood vintage condition; light wear consistent with age\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eFunctionality\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eCursor moves smoothly; scales remain readable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 19.5938px;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 19.5938px;\"\u003eEngineering, scientific calculation, collectible display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 17.5723%; height: 39.1875px;\"\u003eNotable\u003c\/td\u003e\n\u003ctd style=\"width: 79.0306%; height: 39.1875px;\"\u003eAdvanced log-log scales for higher-level mathematical functions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Viridian Eclection","offers":[{"title":"Default Title","offer_id":43074054783081,"sku":null,"price":54.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/0093\/9369\/files\/vintage_slide_rule_ll1_ll2_ll3_log_log_scale_with_cursor_engineeringarchitect_calculating_tool773924336445735150629077097.jpg?v=1775201124","url":"https:\/\/viridianeclection.com\/products\/vintage-slide-rule-ll1-ll2-ll3-log-log-scale-with-cursor-engineering-architect-calculating-tool","provider":"Viridian Eclection","version":"1.0","type":"link"}