2025 Proof Year SetThis six coin Proof Set celebrates the 50th anniversary of the Australian honours system the way that we celebrate the exceptional service and achievement of Australians. Introduced in 1975, by then Prime Minister Gough Whitlam, the Australian honours system created a uniquely Australian way to celebrate those who have made a positive impact. More than 500,000 people have been recognised. Some well known, while the majority famous only to loved ones.