This vintage Pickett Slide Rule Model 903-T Trig Conversion with Sheath is a must-have for collectors and enthusiasts of engineering and science memorabilia. Made in the United States, this slide rule is a reliable and efficient tool for solving trigonometric equations. It comes with a sheath for safekeeping and easy transport. The slide rule is suitable for use in various settings, including engineering, mathematics, and science. Its unique features include a trigonometric conversion table, which makes it an ideal tool for students and professionals alike. This item is a great addition to any collection of slide rules, engineering tools, or science memorabilia.