2022 50c 75th Anniversary Australian Signals Directorate Uncirculated CoinThe Royal Australian Mint commemorates the 75th anniversary of the Australian Signals Directorate (ASD) with this unique and enigmatic coin. ASD's origins date back to World War Il, harnessing and mastering technology to reveal foreign secrets and protect Australia's own. While its methods and mastery of technology have evolved, for 75 years ASD has operated in the slim area between the difficult and the impossible. ASD's mission is to defend