All photos are taken by me. If you have any questions feel free to ask. This is Russian circular slide rule KL-1. It is in good working condition although it has signs of age and use. Manufactured on November 22, 1968.
It can do: multiplication, division, squaring, extraction of a square root, finding of trigonometric functions of a sine, finding of trigonometric functions of a tangent, finding inverse trigonometric functions (of sines and tangents), calculation of the area of a circle. It comes with its original plastic box. There is a manual translated into English on the Internet. Additional photos can be sent.FEEDBACKS: I will try to give you the best service I possibly can. Please leave feedback for me after your parcel arrives. This lets me know that you have received your item(s). PLEASE LOOK CAREFULLY AT THE PICTURES. THEY ARE PART OF THE DESCRIPTION. YOU GET EXACTLY WHAT YOU SEE. The item "SLIDE RULE vintage Soviet Russian circular KL-1 calculator" is in sale since Monday, July 2, 2018. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules". The seller is "rarity_items" and is located in Kiev. This item can be shipped worldwide.