| Country of Origin | Ukraine |
|---|
Check the listing for details. Slid Rule Engineer Logarithmic KL-1 Mathematical Circular Calculator USSR. Condition: Used, Made in Ukraine. Listed at 49.98 USD. You can read about the rules for performing mathematical operations on the KL-1 ruler in the user manual. A slide rule consists of a body with two heads, two dials, one of which is rotated by a black dot head, and two hands, which are rotated by a red dot head.
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