15 Dollars - Elizabeth II 4th Portrait - Discover Australia - Kookaburra - Platinum Proof

Part of Perth Mint's long-running Discover Australia bullion and proof program, this platinum kookaburra issue belongs to a series that rotated native fauna annually to sustain collector demand in a market already saturated by the silver and gold Kookaburra series. The .9995 platinum fineness — fractionally purer than the more common .9990 standard — was a deliberate commercial distinction Perth used to position these against competing sovereign mint platinum offerings.

Mintage on individual Discover Australia platinum proofs from this period was typically capped in the low hundreds, making precise survivors difficult to confirm without Perth Mint's certificate records.