This vintage Lafayette slide rule, model F-428, is a must-have for collectors and enthusiasts of engineering and science memorabilia. Made in Japan, this slide rule measures 13.5 inches in length and 2 inches in width, and comes with a leather sheath for safekeeping and storage. With its precise measurements and high-quality construction, this slide rule is perfect for use in engineering and science applications. Its unique design and vintage appeal make it a great addition to any collection of collectibles. Don't miss out on the opportunity to own this piece of history!