4-Drachma Piece of Antimachus 2nd century BC Silver diameter 29 mm, weight 16.65 g The Greek world penetrated deep into Central Asia in the centuries after the invasion of Alexander the Great. The coins of the Greek kings of Bactria and north-western India illustrate the mingling of Greek and native cultures. This coin shows a Greek king wearing a local headdress on the obverse and the Greek god Poseidon, representing the Indian trident-bearing god Siva, on the reverse.