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| 正面描述 | Cast copper cash coin of traditional East Asian form, featuring a central square perforation surrounded by a flat inner rim. Four Chinese seal-script characters are disposed in the cardinal positions around the central hole, reading clockwise from the top: 乾 (top), 元 (right), 大 (bottom), and 寳 (left), composing the legend 乾元大寳 (Kengen Taihō). The characters are raised in relief against a flat field, enclosed within a plain outer rim. The surfaces display natural olive-brown and verdigris patina consistent with ancient bronze alloy casting. |
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| 正面文字 | Chinese |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | Plain reverse with a central square perforation framed by a slightly raised inner rim and a plain outer rim. The field is entirely blank, showing no inscriptions, symbols, or decorative elements. The surfaces exhibit a heavy, uneven dark brown and blue-green patina typical of ancient cast copper coinage, with the casting seam and surface texture characteristic of Japanese Nara- and Heian-period mint production. |
| 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 | 登录 以查看详情 |