Tetradrachm

By the mid-fifth century, the Athenian tetradrachm had become the dominant trade coin of the eastern Mediterranean — so trusted that foreign cities and satraps struck deliberate imitations rather than issue their own designs. The "owls" circulating in this period were explicitly not updated when Athenian artistic style evolved; conservatism was monetary policy. Merchants from Egypt to the Levant expected the archaic types and would have distrusted anything that looked newer.

The specific reference to Svoronos Plate 108, 5 places this among the later "pi-style" or transitional New Style precursor issues, where subtle die variations in the ethnic lettering and control marks allow reasonably precise workshop attribution.