Keuffel & Esser Co.4081-3

This Keuffel & Esser 4081-3 slide ruler is a high-quality tool that was manufactured in the United States. It comes with leather case (that show some damage see Pictures) Protect it from scratches and damage. The ruler is outstanding for anyone in the engineering or science fields and is a great addition to any collection of vintage tools. The ruler is easy to use and has accurate measurements, making it highly functional for a variety of projects. The craftsmanship of this slide ruler is exceptional and is a testament to the quality of manufacturing in the United States. Perfect for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.