1947 Keuffel & Esser N4081-3 Slide Rule & Leather Case, LOG LOG DUPLEX DECITRIG For Sale

The 1947 Keuffel & Esser N4081-3 Slide Rule is a vintage collectible item originating from the United States. This slide rule is designed for engineering and scientific calculations, featuring a log-log duplex decitrig function. It comes with a leather case for safekeeping and storage, adding to its charm as a nostalgic piece of engineering history. Perfect for collectors or those interested in the history of mathematical tools, this slide rule is a unique and functional item that showcases the craftsmanship of Keuffel & Esser.