This complex slide rule was made in Japan by Sun Hemmi. This model is the 260 with the name on the side. It has scales on both sides and a heavy duty cursor with multiple hairlines. Slide rule and curser are complete and everything is in good condition with some small signs of use and age only (some corrosion to piece of cursor). The container is complete and in good condition. It measures ca. 32 cm or 12 1/2 inches. Check out the attached video on how to operate a vintage slide rule!