File:Keuffel & Esser slide rule, model 4081-3 (ca. 1940) - Detail.jpg
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![File:Keuffel & Esser slide rule, model 4081-3 (ca. 1940) - Detail.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Keuffel_%26_Esser_slide_rule%2C_model_4081-3_%28ca._1940%29_-_Detail.jpg/800px-Keuffel_%26_Esser_slide_rule%2C_model_4081-3_%28ca._1940%29_-_Detail.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:45, 31 May 2013 | ![]() | 1,200 × 800 (334 KB) | Jacopo Werther | {{Information |Description=Slide rule -- KEUFFEL & ESSER CO. N.Y. Date Taken : 2004/12/11 Camera: Canon 10D Lens: Canon EF 100mm f/2.8 Macro lens Exposure: f/16 at 1 second, ISO 100 This slide rule is from around 1940. It was used by my fathe... |
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