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100 Dollars - Elizabeth II 4th Portrait - Koala - Gold Bullion Coin
| Issuer | Perth Mint, Perth, Australia |
|---|---|
| Year | 2013 |
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| Diameter | 27.3 mm |
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| Obverse description | The obverse features the fourth portrait effigy of Queen Elizabeth II, designed by Ian Rank-Broadley, depicted as a right-facing draped bust wearing the Girls of Great Britain and Ireland tiara. The legend ELIZABETH II arcs above and AUSTRALIA to the right, with the denomination 100 DOLLARS inscribed in the lower field. The designer's initials IRB appear truncated below the portrait. The portrait is rendered in high relief against a polished field, emphasizing fine detail in the Queen's facial features and tiara. |
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| Obverse lettering | ELIZABETH II AUSTRALIA 100 DOLLARS IRB |
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| Additional information |
Australia's gold koala bullion series launched in 1980 under the RAM before the Perth Mint took over production, and the annual design change policy — unlike the fixed reverse of a Krugerrand or Maple Leaf — was a deliberate commercial strategy to encourage year-on-year collector demand alongside investment buying. The 2013 issue falls within the period when Perth was aggressively expanding its .9999 fine bullion program, having refined its four-nines purity standard as a direct competitive response to the Royal Canadian Mint's dominance in the ultra-fine bullion market through the 1990s.
The fourth portrait of Elizabeth II, by Ian Rank-Broadley, was adopted by Australian coinage in 1999.