Eretria was an Ionian city-state of ancient Greece. The Eretrians were located right across a narrow body of water from Athens and they were generally staunch allies of Athens. They were also eager traders and merchants…and here is one of their coins. This is a silver didrachm of Eretria featuring a very beautiful Octopus. It dates from the early 4th century BC.
The opposite side of the coin (I can’t quite tell which side is “heads” and which is “tails”) features a cow scratching its face with its back hoof. I would love to tell you more about this evocative imagery but, aside from the obvious connotations of maritime and agricultural prowess, I am at a loss. We will have to appreciate these coins as mysterious little works of silver sculpture unless a passing numismatist or classical scholar drops by in the comments and explains what is going on. The lifelike style of the coin does give one occasion to reflect on how busy and stilted modern American coins are. I have a feeling that two and a half millennia from now, nobody is going to be blogging about the Indiana quarter (unless they are fruitlessly wondering what the hell it is even supposed to be).