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Known as the Astronomic Ring Dial Annulus Astronomicus , the complete name of this instrument is the Universal Equinoctial Ring Sundial. It works on the same principle as the Universal Equatorial Solar Quadrant.
This portable instrument can be used to make astronomical measurements and tell time in all Latitudes.
Non functional item. Available on brass or silver plated, please remember to advise when placing your order.
Diameter: 25mm / Thickness: 1.8mm
Diameter: 0.98" / Thickness: 0.07"
How to buy pins:
Please check Sundials´Pins Pack