The Trihemitartemorion denomination
The trihemitartemorion is an ancient Greek denomination worth 1½ tartemorions, 3/8 obol, or 3/48 drachm.

If this seems like a weird standard, it's because it was actually half a tritartemorion. The name literally means 'half three-quarters-part'.

It weighs roughly 0.27 grammes.
Trihemitartemorion

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