2022 75th anniversary of the Australian Signals Directorate 50c Coin in Card

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The Australian Signals Directorate (ASD) protects Australia from global threats by revealing foreign secrets and protecting our own. The Royal Australian Mint commemorates the 75th anniversary of the ASD with this striking 2022 50c Uncirculated Coin. Embedded in the coin design are six coded messages. Do you have what it takes to crack the codes and discover their secrets?