Keuffel & Esser K+E Slide Rule 4161-1 with Slide and Case

This Keuffel & Esser Company slide ruler is a great find for any collector or enthusiast of engineering tools. In 1959 a division called Optics and Metrology Division was formed to specialize in the development and manufacture of optical, mechanical, and electronic systems for precision measurement of lengths and angles.Made in the United States, this compact 1950's era K&E slide rule is in excellent working condition and comes with a slide and a leather case. Its model number is 4161-1 and indicates that it was made before 1961. Add this rare and rare piece to your collection today! Perfect for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.