Vintage Frederick Post Slide Rule, Sun, Hemmi Japan Description: This slide rule measures 6 inches. It says Frederick Post Co. and the number 1444K is on it. It also says Sun Hemmi, Japan. This comes with a top grain cowhide case. (Top Grain Cowhide is stamped on the back of the case on the very bottom.) It comes with the original plastic case ,all instructions and a lifetime guarantee. Condition is excellent. Feel free to e-mail if you have questions...