In 2013 to celebrate the 25th Anniversary of the first Koala, the Perth Mint released a very Limited Issue Koala $50 Fifty Dollar Platinum Proof Coin struck in solid fine .9995 Platinum weighing one half of an ounce of pure Platinum, accompanying the Anniversary Platinum Proof Coin is a 1/2oz Medallion struck from .999 pure Silver weighing half an ounce of pure Silver.

The reverse design depicts the Koala while the obverse depicts Ian Rank Broadley's portrait of Her Majesty Queen Elizabeth II.
These legal tender coins have been struck to the highest Proof Quality using specially selected blanks and highly polished dies.