Hemiobol

Erythrai, an Ionian Greek city on the Aegean coast of Asia Minor, was among the poleis that threw off Persian control following the Greek victories of 480–479 BC. This tiny fractional silver was almost certainly produced in the decades immediately after that liberation, as the city reasserted its autonomy and resumed independent coinage. At 0.31g, it sits at the lighter end of the hemiobol range, consistent with the slightly variable weight standards common among smaller Ionian mints operating without the discipline of a dominant monetary authority.

The Klein 387 variety designation signals a known die difference from the principal type — details that specialists track closely given how few examples survive in any condition.