100 Dollars - Charles III 1st Portrait - Australian Kangaroo - Gold Proof High Relief

The "high relief" designation here is not cosmetic marketing — it requires a slower, multi-strike pressing process and a specially prepared die that cannot sustain long production runs, which keeps mintages on these pieces structurally low regardless of demand. Perth's bullion Kangaroo series dates to 1989, but the proof high-relief variants occupy a distinct tier of the program technically and commercially.

This is also the first year the series transitions to Charles III's effigy following the death of Elizabeth II in September 2022, making 2024 issues the inaugural portrait coins under the new reign for this denomination.