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| 正面描述 | Fourth portrait effigy of Queen Elizabeth II facing right, modelled by Ian Rank-Broadley, wearing the Girls of Great Britain and Ireland Tiara. The sovereign's name and title appear in the legend surrounding the effigy, reading ELIZABETH II AUSTRALIA 25 DOLLARS, with the engraver's initials IRB truncated at the base of the neck. The design is set within a beaded border. |
|---|---|
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| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | Reeded |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
Australia's platinum Koala series began in 1987, making Perth one of the earliest sovereign mints to issue a platinum bullion program in direct competition with the Canadian Maple Leaf. The 1999–2000 issues coincide with the transition to Ian Rank-Broadley's effigy of Elizabeth II, which first appeared on Australian coinage in 1999 — the fourth and final portrait used during her reign on Perth Mint bullion before subsequent refinements.
Platinum spot prices collapsed through much of 1999, briefly falling below gold — a rare inversion that suppressed collector premiums on platinum issues from this period at time of release.