Catalog
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| Issuer | Perth Mint, Australia |
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| Year | 2015 |
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| Orientation | Medal alignment ↑↑ |
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| Obverse description | The fourth effigy of Queen Elizabeth II by Ian Rank-Broadley, depicting the Queen in right-facing profile wearing the Girls of Great Britain and Ireland Tiara. The truncated bust portrait is rendered in high relief against a polished field. The obverse legend surrounding the effigy reads ELIZABETH II AUSTRALIA 10 DOLLARS, with the engraver's initials IRB appearing below the bust. |
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| Reverse script | Latin |
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| Additional information |
Australia's silver Koala bullion series has changed reverse designs annually since its 1988 launch — a deliberate strategy by the Perth Mint to drive collector demand alongside pure bullion buyers. The 2015 issue falls within the fourth portrait era for Elizabeth II, sculpted by Ian Rank-Broadley, which ran from 1998 until it was replaced by Jody Clark's effigy in 2016. This is one of the last Koala ten-dollar coins to carry Rank-Broadley's likeness before the transition.