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| 正面描述 | Rectangular flan with a border of raised pellets encircling the entire perimeter. Four kanji characters arranged vertically in two columns across the central field, reading 常銀是座 (Joginza, denoting the Ginza silver mint authority). Superimposed at the upper centre is an incuse countermark stamp bearing the single character 定 (Jo), certifying authenticity and quality. The hammered surface displays a characteristic striated texture throughout the field. |
|---|---|
| 正面文字 | Chinese (traditional, regular script) |
| 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 | 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 Ansei Isshugin was struck following the forced opening of Japanese ports under the Convention of Kanagawa in 1854, a direct response to Commodore Perry's expedition. Foreign merchants exploited the exchange rate between Japanese gold and silver — drastically out of alignment with global ratios — to drain the country of gold coins at enormous profit. The Shogunate's monetary reforms during this decade were partly an attempt to stem that hemorrhage, though they proved largely ineffective before the system collapsed entirely at the Meiji Restoration.