Tetradrachm signed by Eucleidas circa 405-400 bC.
Obverse side: A female charioteer drives a fast quadriga, holding reins in hand and raising a flaming torch while Nike is flying to crown her.
Reverse side: Head of Athena facing three-quarters wearing double-hook earrings, a necklace of pendant acorns with central gorgoneion-medallion, and a triple-crested Attic helmet. On both sides, two dolphins swim downwards.
What's the deal?
The coin embodies value and serves as a cultural symbol.
Coinage is an act of collective faith grounded in social conventions.
You believe that it has intrinsic value. that's it!