Please look through all pictures for condition. The slide works smoothly. The box is not in the best shape, however the leather case is excellent. There is a flaw on the slide window side, price will reflect these things . The N4081-3 K&E Log Log Duplex Decitrig Slide Rule is a collectible engineering tool from the 1930s, housed in a leather pouch and green box for safekeeping. This slide rule allows users to accurately perform complex calculations in engineering and scientific fields, making it a valuable piece for collectors and enthusiasts alike. Its compact design and durable packaging make it a convenient and practical tool for both everyday use and display.