This rotatable star chart with centre cursor was produced in Germany by Franckh-Kosmos in 1977. It consists of 2 large plastic discs that rotate in order to show the celestial sky every hour of every day of the year in Germany. In addition it has a cursor for precise identifying stars. It has instructions in the back in German only. It is in good condition without cracks and with only small signs of normal use or age (mostly some yellowing on the back). It is fully functioning and the diameter of this slide rule is 25 cm or 10 inches. Check the attached video on how to work such a vintage man tool!
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Planisphere Astronomical circular slide rule Franckh-Kosmos 1977 Germany
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Planisphere Astronomical circular slide rule Franckh-Kosmos made in 1977 in Germany
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Out of stock
Category: Sold Stuff
Tags: 1970's, Germany, Slide rule, Working order
Description
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