Sun Hemmi 80K Electro slide rule wrapped in case 1970 Japan

This slide rule was made by Sun Hemmi from Japan in the 1970’s It is constructed of bamboo with celluloid layers on top and completed with a metal rimmed cursor. It is the late model 80K electro with dedicated scales. The rule is still in the original plastic wrapper which is open on one side. It measures ca 30 cm or 12 inches long. The slide rule is in close to new condition, hardly any signs of age, the original labeled box shows some signs of storage only. Check the attached video on how to work your vintage man tool : slide rule operation instructions!