This vintage slide rule from 1981 is a must-have for any collector of engineering and science memorabilia. Made in the United States by Weaver Electric, this motor data calculator slide rule is a unique piece of history that will make a great addition to any collection. With its precise calculations and durable construction, this slide rule is a valuable tool for engineers, scientists, and collectors alike. The slide rule is in great condition and has been carefully preserved over the years. Don't miss out on the opportunity to own this rare piece of American engineering history.