Australian 50c coin could be worth $14,750 after printed with error | news.com.au — Australia's leading news site
![Amateur code breakers challenged to decipher secret messages on Australian coin | Australia news | The Guardian Amateur code breakers challenged to decipher secret messages on Australian coin | Australia news | The Guardian](https://i.guim.co.uk/img/media/55be085555565bb9f4f6a53317512a735d9bc5de/0_0_2500_1500/master/2500.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=44e142bff8381212d9aea4af602a5511)
Amateur code breakers challenged to decipher secret messages on Australian coin | Australia news | The Guardian
Can you crack it: Limited-edition 50 cent coin released by Australia's secret intelligence agency contains a hidden code | Sky News Australia
![Australian Coins :: Australian Decimal Coins 1966 - 2023 :: 2009 Fifty Cent Coat of Arms (50c) Uncirculated Australian Decimal Coin - ex. Mint Set Australian Coins :: Australian Decimal Coins 1966 - 2023 :: 2009 Fifty Cent Coat of Arms (50c) Uncirculated Australian Decimal Coin - ex. Mint Set](https://www.prospectstampsandcoins.com.au/images/product/24/nov05-2006-50c-proof-12-sided-REV1378705544522d6088e4d71.jpg)