Clay Eschara found at Building Z3 at Kerameikos at Athens, As.Nr. Kerameikos 5127; ca. 375-325 BC.
Picture taken by <a href="//commons.wikimedia.org/wiki/User:Marcus_Cyron" title="User:Marcus Cyron">Marcus Cyron</a>
CC BY-SA 3.0
Picture taken by <a href="//commons.wikimedia.org/wiki/User:Marcus_Cyron" title="User:Marcus Cyron">Marcus Cyron</a>