Tetartemorion

Cilicia in the fourth century produced a sprawling, poorly documented coinage from numerous small mints, many of which remain unattributed after more than a century of scholarship. At 0.18g, this denomination was the smallest practical unit of Greek silver coinage — a quarter of an obol, itself already a fraction — and would have served daily transactions too minor for larger silver to handle economically.

The Sunrise Collection reference places it within a well-documented group, but the issuing city is still debated.