15 Dollars - Elizabeth II 4th Portrait - Cooktown Orchid - Platinum Proof

The Cooktown Orchid series was part of Perth Mint's broader push in the mid-2000s to capture the high-end bullion collector market with fractional platinum proofs tied to Australian floral emblems. The Cooktown Orchid itself is Queensland's floral emblem, designated so in 1959. Pad printing on platinum at this scale — a 3.11g flan — was technically demanding enough that production runs were kept deliberately tight, and Perth's application of the technique to precious metal proofs at this time was genuinely uncommon in the industry.