Tetradrachm

Mitchiner's Ancient & Classical World places these issues within the broader coinage of the Indo-Greek successor states of Bactria, where local princelings struck debased imitations of Hellenistic tetradrachms long after the Greek kingdoms themselves had collapsed. By this period the denomination had lost almost all connection to its original weight standard — a bronze piece of 5 grams calling itself a tetradrachm is purely conventional, the name surviving the metal by centuries.