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Rectangular Ivory Diptych Sundial: Details

The top face of the sundial when closed (left), showing the wind vane.
A rotating disk on the underside (right), called a lunar volvelle, showed the age of the moon and enabled the user to find time by moonlight.


CHSI Inv. Number 7568
Date: 1636
Leonhart Miller
Nuremburg, Germany


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