The Vintage 1947 PICKETT ECKEL Model 4 Slide Rule is a rare piece of engineering history from the United States. This vector type slide rule, manufactured in the 1940s, is a valuable collectible for those interested in the history and practice of engineering. The slide rule comes with its original case and has not been modified, making it a true vintage piece from that era. Ideal for collectors or enthusiasts of slide rules, this item showcases the quality craftsmanship and design of American engineering in the mid-20th century.