Circular slide rule Cirta II (NOS)
Surveying circular slide rule Cirta II, produced in Dřevoplast Nový Jičín factory in the end of the 70's or beginning of 80's. Although the slide rule is NOS, it has some longer storage marks, like blurred color on the numbers and segments of the inner circle, but it is normally readable. Otherwise very nicely preserved item.
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