8 Dollars - Elizabeth II 4th Portrait - Australian Koala - Silver Proof High Relief

The Australian Koala silver series has run since 2007, but the high-relief strikes represent a technical departure that required significantly more die pressure and slower production rates to achieve the pronounced depth of field. Perth has refined this process incrementally, and by 2016 the results were measurably cleaner than the earliest high-relief issues in the program.

The fifth-ounce denomination structure used here — eight dollars to five troy ounces — is a Perth convention with no real-world exchange function, existing purely to satisfy the legal tender requirement under Australian law for bullion collector issues.