15 Dollars - Elizabeth II 4th Portrait - Brolga - Gold Proof

The brolga series from Perth Mint belongs to a run of fractional gold bullion proofs issued under the Australian Bird of Prey and native wildlife programs of the late 2000s. Perth's .9999 fineness was a deliberate commercial positioning against the Royal Canadian Mint's .9999 Maple Leaf, both mints competing aggressively for the Asian collector-investor market during the commodity boom that preceded the 2008 financial crisis.

KM#1225 is a low-mintage proof with strictly capped production — Perth rarely disclosed exact figures for this subset, but surviving population data from PCGS and NGC suggests numbers well under 2,000.