Didrachm
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The Didrachm was a coin used by the Greek and Romans. The coin was worth two drachma. The Romans started using the didrachm around 280 BC and stopped using it around 211 BC.

Background
The denomination of the Didrachm was invented by the Greek.[1] Early Roman silver coins were modeled after similar Greek currency.[2] The weight of the Roman coin was also the same as Greek cities.[3] The legend Romano distinguished the coin from Greek coins of the same period.[3][1] The coin was equal to two drachma[4] or a Jewish half shekel.[5]