A HEMMI slide rule, made of bamboo, 32cm long, with a case. I used this during my school days for classes and exams. I never used it again after getting a job. I've completely forgotten how to use it now, but it should be able to perform the following calculations: addition, subtraction, multiplication, division, squares, cubes, square roots, cube roots, logarithms, exponential calculations, trigonometric functions, etc. There are stains and dirt, but I think it functions without any problems. The case is quite dirty. Thank you for looking.