Greek coins

The history of Ancient Greek coinage can be divided (along with most other Greek art forms) into four periods, the Archaic, the Classical, the Hellenistic and the Roman. The Archaic period extends from the introduction of coinage to the Greek world during the 7th century BC until the Persian Wars in about 480 BC. The Classical period then began, and lasted until the conquests of Alexander the Great in about 330 BC, which began the Hellenistic period, extending until the Roman absorption of the Greek world in the 1st century BC.

The Classical period saw Greek coinage reach a high level of technical and aesthetic quality. Larger cities now produced a range of fine silver and gold coins, most bearing a portrait of their patron god or goddess or a legendary hero on one side, and a symbol of the city on the other.

All Greek coins were handmade, rather than machined as modern coins are. The design for the obverse was carved (in incuso) into a block of bronze or possibly iron, called a die. The design of the reverse was carved into a similar punch. A blank disk of gold, silver, or electrum was cast in a mold and then, placed between these two and the punch struck hard with a hammer, raising the design on both sides of the coin.

Source: http://en.wikipedia.org/wiki/Ancient_Greek_coinage