Tritartemorion

Sikyon maintained an unusually stable coinage through the fourth century, resisting the broader move toward Macedonian-influenced types that reshaped so many Peloponnesian mints after Philip II's campaigns. The tritartemorion — three-quarters of an obol — is among the smallest silver denominations struck anywhere in the Greek world, produced for transactions too small for even a standard obol to serve.

The BCD collection reference places this firmly within a well-documented sequence, though individual specimens vary enough in die alignment and flan preparation to suggest small-batch production runs rather than continuous output.