200 Dollars - Elizabeth II 4th Portrait - Koala - Gold Bullion Coin

Australia's gold koala series, produced by the Perth Mint, changes its reverse design annually — a deliberate policy introduced to discourage melting and encourage collector retention, giving each year's issue a discrete identity in the bullion market. The 2013 two-ounce piece is among the mid-series issues before the program's later expansion into fractional and larger formats reshaped collector demand for the two-ounce denomination specifically.

Perth's .9999 refining standard, achieved consistently from the early 1990s onward, was a direct competitive response to the Royal Canadian Mint's four-nines gold Maple Leaf program.