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| 表面の説明 | ログイン して詳細を見る |
|---|---|
| 表面の文字体系 | Latin |
| 表面の銘文 | ログイン して詳細を見る |
| 裏面の説明 | Central design reproducing the famous 1855 Western Australia 'Inverted Swan' postage stamp error, depicted in relief within a square frame with a crosshatch background pattern; a swan is shown facing left in the centre of the stamp vignette, with the stamp inscriptions rendered in mirror-image inversion as on the philatelic error. The stamp motif is set within an octagonal border formed by a segmented decorative frame. The legend '150TH ANNIVERSARY OF THE INVERTED SWAN' arcs around the upper and side periphery, divided into segments, with 'AUSTRALIA FOUR PENCE WESTERN POSTAGE' appearing as part of the inverted stamp design, and the denomination '$5' inscribed at the base of the coin. |
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| 縁 | ログイン して詳細を見る |
| 鋳造所 | ログイン して詳細を見る |
| 鋳造数 | ログイン して詳細を見る |
| 追加情報 |
The British Virgin Islands issued a run of titanium collector pieces in the mid-2000s exploiting the metal's unusual optical properties — titanium develops interference colors when anodized, allowing mint technicians to produce iridescent surface effects impossible in gold, silver, or base metal. The swan pieces from this series were struck by the Pobjoy Mint, which had pioneered titanium coinage in the late 1990s and held a near-exclusive grip on the technology for over a decade.
Pobjoy's first titanium coin appeared in 1999 for the Isle of Man.