Keuffel & Esser 4080-5 20" Log Log Decitrig slide rule with leather case

The Keuffel & Esser 4080-5 20" Log Log Decitrig slide rule is a high-quality engineering tool made in the United States. This collectible slide rule comes with a leather case for protection and storage, making it a reliable and durable tool for scientific and medical calculations. With its precise measurements and American craftsmanship, this slide rule is a valuable addition to any professional or collector's arsenal.