目录
查看完整图片 — 免费注册
使用Google继续 — 免费
或用邮箱注册
为什么需要注册？只是为了防止机器人访问我们的目录。您的邮箱完全保密——我们绝不会分享或在未经您许可的情况下发送任何内容。我们向您保证！
| 正面描述 | 登录 以查看详情 |
|---|---|
| 正面文字 | Latin |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 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. |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | 登录 以查看详情 |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
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.