This rotatable star chart was produced in England by George Philip and sons from London in the 1970’s or so. It consists of 2 large plastic discs that rotate in order to show the celestial sky every our of every day of the year. It has instructions in the back in English, German, French and Swedish. It is in good condition without cracks and with only small signs of normal use or age. 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 this vintage man tool!
Philip Planishere Astronimical circular slide rule 1970 England
Philip Planishere Astronimical circular slide rule / star chart made ca. 1970’s in England
Out of stock