15 Dollars - Elizabeth II 6th Portrait - Kangaroo - Gold Bullion Coin

Australia's gold kangaroo bullion series has been issued continuously since 1987, making it one of the longer-running national gold bullion programs. The 15-dollar denomination corresponds to the one-tenth troy ounce increment, a fraction introduced to bring investment-grade .9999 fine gold within reach of smaller buyers. Perth Mint's four-nines fineness specification has been a consistent feature since the series' early years, at a time when most sovereign mints were still issuing bullion at .999 or lower.