150 Dollars - Charles III 1st Portrait - Australian Wedge-tailed Eagle - Bi-Metal Proof

Perth Mint's bimetallic bullion program has paired gold centers with outer rings in various metals since the 1990s, but the platinum-ring configuration remains the most technically demanding — platinum's hardness makes die wear a persistent production issue, and strike pressure must be calibrated differently than for gold-on-gold or gold-on-silver formats. This is also the first year the series carries Charles III's effigy, following the updating of Commonwealth coinage portraits after Elizabeth II's death in September 2022.