This complete set of container, slide rule and manual are made in Japan by Sun Hemmi specially for the Dutch market. This model is the more rare 642T with that was made for Arend a global Company based in Holland. 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 signs of use and age. Manual shows clear signs of use (some pitting on front). Slide rule comes in original plastic sleeve. It measures ca. 30 cm or 12 inches. Check out the attached video on how to operate a vintage slide rule!