1/3 Siglos - Darius I / Xerxes I

The fractional siglos series poses one of the more stubborn attribution problems in Achaemenid numismatics — the overlap in type between Darius I and Xerxes I is genuine, not a cataloging shortcut, reflecting a deliberate continuity in royal imagery that Persian minting practice maintained across reigns. These fractions circulated widely in western Anatolia, where Greek mercantile networks absorbed Persian silver in denominations the local economy actually needed.

At 1.8g, the third-siglos was struck on the Babylonian weight standard that underpinned Achaemenid fiscal administration across the empire.