Tetartemorion

These fractional silver pieces were struck at Persian-controlled mints in western Anatolia to meet the demand for small-change transactions in a Greek-speaking commercial environment. The Achaemenid administration was pragmatic about local monetary custom — where Greek cities already used fractional denominations, satrapial mints simply continued the practice under Persian authority rather than imposing a unified coinage system.

The Sunrise collection reference places this among a tightly catalogued group of Anatolian fractions. At roughly a quarter-obol's worth of silver, these were the smallest meaningful unit in daily market exchange.