Logarithmic ruler Round line Vintage round line Made in ussr Logarithmic meter Ancient calculator USSR buying round line Old calculator KL-1 ruler

Soviet pocket "Logarithmic ruler"
Released in the era of the Soviet Union in the 1960s.
Good, working condition. (Close to new)
In the full original.

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Case dimensions:
Case size 53 mm (with crown)

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Best regards,
Alex buying