This sterling slide rule is a must-have for any collector or enthusiast of vintage engineering and science equipment. Made in the United States in 1965, this decimal trig log-log rule is a true gem for anyone interested in the history of technology. The plastic case adds to its durability and makes it a great addition to any collection. Whether you're a mathematician, engineer, or just a collector, this slide rule is sure to impress. Its unique design and historical significance make it a valuable addition to any collection. Don't miss your chance to own a piece of American history with this sterling slide rule. 12” long.