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15 Dollars - Elizabeth II 4th Portrait - Koala - Gold Bullion Coin
| Issuer | Perth Mint, Australia |
|---|---|
| Year | 2010 |
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| Engraver(s) | Ian Rank-Broadley |
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| Obverse description | Fourth portrait effigy of Queen Elizabeth II facing right, as designed by Ian Rank-Broadley, the Queen wearing the Girls of Great Britain and Ireland Tiara. The obverse legend reads ELIZABETH II AUSTRALIA 2010 15 DOLLARS, with the engraver's initials IRB appearing below the portrait truncation. |
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| Reverse description | A highly detailed rendering of a koala (Phascolarctos cinereus) clinging to and climbing along a eucalyptus branch, depicted in close-up with fine fur texture rendered in high relief against a plain field. The Perth Mint's 'P' mintmark appears to the lower left of the design, while the legend 1/10 OZ 9999 GOLD is inscribed along the lower rim of the reverse field. |
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| Additional information |
Australia's gold koala bullion series launched in 1980 under the Australian Nugget branding before being reoriented toward the koala theme in 1990. The Perth Mint changes the reverse design annually — a deliberate policy intended to drive collector demand on top of the underlying bullion value, a strategy borrowed directly from the Canadian Maple Leaf program's early success. The 2010 issue falls under Ian Rank-Broadley's fourth portrait of Elizabeth II, introduced across Australian coinage in 1999.
The fractional denominations in this series have historically commanded steeper premiums over spot than the one-ounce issues, simply due to higher per-gram production costs.