This vintage 10 inch slide rule 10B is a must-have for collectors of engineering instruments. Made in the United States by Engineering Instruments, Inc., this slide rule is a true gem for anyone interested in the history of engineering and medicine. Its sleek design and precision make it a valuable addition to any collection of science and medicine memorabilia. Whether you're a seasoned collector or a beginner, this slide rule is sure to impress. Its unique design and history make it a great conversation starter. Add it to your collection today and enjoy the satisfaction of owning a piece of American history.