The 1/12 Siglos denomination
The Siglos was a coin denomination in the Persian Achaemenid Empire, and was roughly equivalent to 7½ Attic obols.

In more understandable terms, it generally weighed 5.40 grammes, and was struck from circa 520 BC to 330 BC.

The 1/12th Siglos correspondingly weighed circa 0.45 grammes.
1/12 Siglos

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