Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule Soviet USSR Box for Sale

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Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule Soviet USSR Box For Sale

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Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule Soviet USSR Box:
$35.00

DESCRIPTIONVintage Logarithmic Ruler KL-1The circular logarithmic ruler KL-1 is designed to perform the most common mathematical operations in practice: multiplication, division, combined operations, squaring and cubing, extracting square root, finding trigonometric functions of sine and tangent, as well as the corresponding inverse trigonometric functions, calculating the area of a circle, calculating the weight of round parts. A logarithmic ruler consists of a body with two heads, two dials, one of which is rotated by the head with a black dot, and two hands, which are rotated by the head with a red dot. Against the black dot head above the movable dial there is a fixed pointer.On the movable dial are two scales: the inner (main) - counting and the outer - the scale of squares of numbers. On the fixed dial are three scales: the outer scale - counting, similar to the inner scale on the fixed dial, the middle scale - the values of angles to count their sines and the inner scale - the values of angles to count their tangentsv. The rules of performing mathematical operations on the KL-1 ruler can be found in the user's manual.
Below is a circular logarithmic ruler, with the logo of the 50th anniversary of the October Revolution, sorry, the arrow is lost.
1. What you see is what you get.2. About Color: As there will be some of each color display (monitor brand, brightness, contrast adjustment set different, etc.), So the subject goods in kind3. Condition-see photo. Please Examine Photos carefully, both front and back, for flaws. If You have any question or You need more pictures please write me.*4. I do not watchmaker. I do not do the repair, restoration or maintenance of watches. I do not guarantee that it works accurately and long term.5. See my other lots there are very interesting things.6. Visit my STORE VintageUSSR!7. If you'll need anything from Belarus, just ask and I will try to find it for you!8. I wish you a happy shopping.PAYMENT

1. Payment is due within 3 days of sale completion.
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SHIPPING

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5. Shipping to Europe takes 7-15(sometimes it takes up to 25) business days.
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