1968 Circular Slide RULE LOGARITHMIC KL-1 manual rules Moscow Soviet Russia USSR

Description

Original Very rare Vintage Soviet Russia
LOGARITHMIC Circular slide rule KL-1,
1968, Past century, and included 2 more logarithmic rules.
made in USSR -Soviet Union, Moscow.
Diameter dial about 45 mm.
Authentic! Made in USSR, 60s, Moscow.
This rule is made by the Soviet Union control devices
for the Ministry of Instrumentation of the USSR.
Box. Manual.
1.  Multiplication
2.  Division
3.  Squaring
4.  Extraction of a square root
5.  Finding of trigonometric functions of a sine
6.  Finding of trigonometric functions of a tangent
7.  Finding inverse trigonometric functions (of sines and tangents)
8.  Calculation of the area of a circle
The rule is in good Working Condition.
Great item for the collectors,
the perfect gift for scientists, mathematicians, students.
Used. A condition on a REAL photo.
Look at the ACTUAL photos!
You receive what you see.