{"product_id":"concise-circular-slide-rule-28-english-version-made-in-japan-1968","title":"Concise Circular slide rule 28 English Version, made in Japan 1968","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0568\/5444\/6280\/files\/free_shipping10.jpg?v=1663020212\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eMy Dad gave me this when I was in H.S. in 1968, I never used it (and neither, I doubt, will you) I've owned this for 58 years, so I'm listing it as USED however its in as-new condition with its original manual and packaging sleeve. \u003c\/p\u003e\n\u003cp\u003e・English specifications for “Slide Rule No. 27”\u003cbr\u003e・This is the most popular circular slide rule, and it is a basic slide rule that can easily perform calculations other than addition and subtraction, such as multiplication, division, squaring, and cubing, so it is used in all fields.\u003cbr\u003e・Types of calculations: General multiplication and division, proportionality (exponential percentages), squares, and cubes\u003cbr\u003e・Back side: Unit conversions for length, area, volume, mass, temperature, pressure, speed, etc.\u003cbr\u003e・Scale: D, C, CI, A, K (surface)\u003cbr\u003e・Comes with a dedicated storage case and instruction manual.\u003c\/p\u003e","brand":"Acu-math","offers":[{"title":"Default Title","offer_id":45029394153672,"sku":null,"price":69.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/5444\/6280\/files\/PXL_20260309_022710498.jpg?v=1773869020","url":"https:\/\/reticulum.online\/en-ca\/products\/concise-circular-slide-rule-28-english-version-made-in-japan-1968","provider":"Reticulum","version":"1.0","type":"link"}