Silver tetrobol from Euboea. 14 mm dia., 1.39 grams
Coin photo from L5 auctions at: https://l5.com/Event/LotDetails/174303/EUBOEA-Histiaia-Silver-Tetrobol-3rd2nd-centuries-BC
A similar coin with the same text.
Coin photo from Wikimedia Commons at: https://en.wikipedia.org/wiki/File:Euboia_Histiaia_2_BMC61_1.xcf
(June 15, 2025) Based on the text, the head represents the Druid goddess Ayu who is the cresent moon goddess and editor of the life network which directs the life powers to earth to trigger life manifestations. Notice she is wearing a pearl necklace which represents moon powers in general. Her hair is radiant representing the emanations of those life powers which flow through her network.
The other side of the coin shows her sitting on the bow of a boat acting as the navigator. Because she is represented by the crescent in the crescent moon she is also symbolized by boats with high curving bows and stern posts. Her epithet in the runic texts is actually "reed-boat." She seems to be holding some sort of navigating device. Notice that the boat is showing a wing below and left of Ayu. This indicates the boat is a celestial boat floating across the sky-shell.